Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| [enrichment of the vegetalizing induction factor from the clawed toad (xenopus laevis) gastrula and determination of the molecular weight range by gradient centrifugation]. | 1970 | 5446639 | |
| neurulation in xenopus laevis. an analysis and model based upon light and electron microscopy. | 1970 | 5449482 | |
| mutations affecting the size of the nucleolus in xenopus laevis. | 1970 | 5451103 | |
| accelerated synthesis of urea in xenopus laevis during osmotic stress. | 1970 | 5459477 | |
| inhibitory effects of colchicine on ciliogenesis in ectoderm of xenopus laevis. | 1970 | 5461419 | |
| a spontaneous anaplastic intestinal metastasising carcinoma in a south african clawed toad (xenopus laevis daudin). | 1970 | 5464115 | |
| renal function during osmotic stress in the aquatic toad xenopus laevis. | 1970 | 5466608 | |
| transmission of the "lymphoid tumour" of xenopus laevis by injection of cell-free extracts. | 1970 | 5468598 | |
| the influence of colloidal carbon on hemagglutinin production in the toad, xenopus laevis. | 1970 | 5471975 | |
| the effects of change of background colour on the rate of [3h]leucine incorporation and total melanocyte-stimulating hormone content of the pars intermedia of xenopus laevis. | 1970 | 5472415 | |
| the involvement of catecholamines in the dispersion reaction of the melanophores of xenopus laevis in vivo. | 1970 | 5478656 | |
| composition and structure of chromosomal and amplified ribosomal dna's of xenopus laevis. | 1970 | 5485907 | |
| ribosomes from xenopus laevis ovaries and the polyuridylic acid-directed biosynthesis of polyphenylalanine. | single ribosomes account for 90% or more of the ribosome fraction of xenopus laevis ovaries. these ribosomes have low endogenous activity in a cell-free protein-synthesizing system but synthesize polyphenylalanine in the presence of poly u under conditions comparable with those reported for mammalian or bacterial systems. these observations agree with the view that the ribosome is deficient in mrna. | 1970 | 5488911 |
| ribonucleic acids and ribonucleoproteins from small oöcytes of xenopus laevis. | 1970 | 5490269 | |
| the lateral line system at metamorphosis in xenopus laevis (daudin). | 1970 | 5493274 | |
| stimulation of cell division in pronephros of embryonic grafts following partial nephrectomy in the host (xenopus laevis). | 1970 | 5493275 | |
| reduction of ribosomal rna synthesis and ribosomal rna genes in a mutant of xenopus laevis which organizes only a partial nucleolus. ii. the number of ribosomal rna genes in animals of different nucleolar types. | 1970 | 5493280 | |
| morpho-functional study of hypothalamic neurosecretion. iv. the effect of osmotic stress on the preoptico-neurohypophysial system of rana esculenta, rana temporaria, and xenopus laevis. | 1970 | 5493990 | |
| on the development of the blood island in xenopus laevis embryos: light and electron microscope study. | 1970 | 5495675 | |
| sulphation of simple aliphatic alcohols and bile alcohols by the toad xenopus laevis. | 1970 | 5500296 | |
| reduction of ribosomal rna synthesis and ribosomal rna genes in a mutant of xenopus laevis which organizes only a partial nucleolus. i. ribosomal rna synthesis in embryos of different nucleolar types. | 1970 | 5500443 | |
| conduction velocity in myelinated nerve fibres of xenopus laevis. | 1. the relationship between conduction velocity and nerve diameter in single myelinated nerve fibres from xenopus laevis was measured and was found to be linear.2. the relationship between conduction velocity and temperature in nerve fibres of various diameters was measured over the range 15-30 degrees c and was found to be linear for each fibre.3. the slope of the conduction velocity-temperature relationship was directly proportional to the diameter of the nerve fibre.4. the form of the conduct ... | 1970 | 5500723 |
| melanogenesis in amphibians. 3. the buoyant density of oocyte and larval xenopus laevis melanosomes and the isolation of oocyte melanosomes from the eyes of ptu-treated larvae. | 1970 | 5501464 | |
| differential inhibition of 28s-18s rna and 5s rna synthesis in the cycloheximide-treated xenopus laevis embryonic cells. | 1970 | 5503782 | |
| slow ventral root potentials in the spinal frog (xenopus laevis). | 1970 | 5505873 | |
| the re-establishment of retinotectal projections after uncrossing the optic chiasma in xenopus laevis with one compound eye. | 1970 | 5511133 | |
| the nature of mitochondrial rna in oocytes of xenopus laevis and its relation to mitochondrial dna. | 1970 | 5516339 | |
| [transfer of the species-specific behavior componets by xenoplastic transplantation of the brain rudiments between xenopus laevis and hymenochirus boettgeri (amphibia, anura)]. | 1970 | 5517153 | |
| analysis of detergent extracts of developing xenopus laevis by microelectrophoresis. | 1970 | 5518032 | |
| aspects of the ultrastructure of the alimentary canal and associated glands of the xenopus laevis larva. | 1970 | 5519115 | |
| an immunofluorescent study of the haemoglobins in metamorphosing xenopus laevis. | 1970 | 4915509 | |
| a comparison between granulomatosis and lymphoreticular neoplasia in diemictylus viridescens and xenopus laevis. | 1970 | 4922466 | |
| studies of antibody formation in xenopus laevis. | 1970 | 4910477 | |
| immunological maturation and lymphoreticular cancer transformation in larval xenopus laevis, the south african clawed toad. | 1970 | 4912505 | |
| some characteristics of the "lymphoid tumour" inducing agent of xenopus laevis. | 1970 | 4989050 | |
| [a recessive lethal mutation, "bt" (bent tail) in xenopus laevis daudin]. | 1970 | 4990885 | |
| [tolerance of cutaneous allografts in xenopus laevis. influence of the size and age of the graft]. | 1970 | 4997613 | |
| lymphoreticular disorders and responses in xenopus laevis the south african clawed toad. | 1970 | 4950973 | |
| the mitochondrial ribosome of xenopus laevis. | a mitochondrial ribosome with an approximate sedimentation coefficient of 60 s has been isolated from the ovary of the south african clawed toad, xenopus laevis. this ribosome is active in a submitochondrial protein-synthesizing system. it contains two species of rna, designated as "21s" and 13s rna, which have sequences complementary to mitochondrial dna and share no detectable sequence homology with cytoplasmic ribosomal rna. | 1970 | 5273890 |
| studies on secretory activity in the pars intermedia of xenopus laevis 1: fine structural changes related to the onset of secretory activity in vivo. | changes in the fine structural organization of the pars intermedia related to the onset of secretory activity within the gland have been studied. it is shown that during the first seven days, following the onset of secretory activity, there is an extensive membraneogenesis within the cytoplasm of the parenchymatous cells of the pars intermedia which results in the formation of a well-organized array of endoplasmic reticulum and an increased development of the golgi complex. simultaneously the la ... | 1970 | 18631500 |
| studies on secretory activity in the pars intermedia of xenopus laevis 2: a biochemical and electron cytochemical investigation of acid hydrolase activity following the stimulation of secretory activity in vivo. | in the msh cell at the onset of secretory activity, acid hydrolase activity increases. this increased activity, shown quantitatively by assaying beta-glycerophosphatase and r-glucuronidase within the stimulated gland, has been shown by electron cytochemical methods for beta-glycerophosphatase (acid phosphatase) and aryl sulphatase to be related to the production of large numbers of dense bodies. cytochemical evidence also supports the view that these lytic bodies arise from gerl-like cisternal e ... | 1970 | 18631501 |
| studies on secretory activity in the pars intermedia of xenopus laevis 3. the synthesis and release of melanocyte stimulating hormone (msh) in vitro. | methods of bioassay and electron microscopy have been employed in the study of secretion of msh from single pars intermedia/nervosa lobes maintained in vitro. it is shown that in a modified krebs-ringer medium the tissue displays an endogenous capacity for the synthesis and release of msh. the amount of msh produced is directly related to the development and functioning of the endoplasmic reticulum within the msh cell, and although a net increase in the amount of msh is adversely affected by ana ... | 1970 | 18631502 |
| putrescine and spermidine biosynthesis in the development of normal and anucleolate mutants of xenopus laevis. | ornithine decarboxylase (ec 4.1.1.17), the enzyme that catalyzes the synthesis of putrescine from ornithine, increases dramatically in developing xenopus embryos. between the 2-cell stage and early blastula stage, activity increases 10-fold, and in swimming tadpoles, the enzyme activity is 100-fold higher than that present in either unfertilized eggs or 2-cell embryos. s-adenosyl-l-methionine decarboxylase, an enzyme that catalyzes spermidine synthesis from putrescine and s-adenosyl-l-methionine ... | 1971 | 5276754 |
| rna-dependent dna polymerase: possible role in the amplification of ribosomal dna in xenopus oocytes. | 2',5' - dimethyl - n(4')benzyl - n(4') - [desmethyl]rifampicin, a derivative of rifampicin, is used to acquire autoradiographic evidence that rna-dependent dna synthesis is involved in gene amplification during the early oogenesis of xenopus laevis. | 1971 | 5288255 |
| the cortex of xenopus laevis embryos: regional differences in composition and biological activity. | the cortex of fertilized xenopus laevis eggs undergoes regional changes in its composition and morphogenetic activity during the first three divisions. gray crescent and animal pole cortex of stage 1 (1-cell) and stage 4 (8-cell) embryos each contain a characteristic array of proteins. implantation of pieces of cortex into the blastocoel of midblastula embryos was used to assay their inductive capacity. the gray crescent cortex was shown to be the only region that had significant axis-inducing a ... | 1971 | 5289235 |
| purification and some characteristics of 5s dna from xenopus laevis. | dna containing the multiple genes for 5s rna has been isolated from the genome of xenopus laevis. whereas 5s rna is about 57% g + c, the 5s dna has a base composition of about 33-35% gc and consists of two alternating regions that differ in base composition by at least 20% gc. a denaturation map of 5s dna analyzed by electron microscopy demonstrates that the repeating pattern is regular and each repeating unit has a mass of about 500,000 daltons. if one gene for 5s rna (84,000 daltons native) we ... | 1971 | 5289255 |
| [sensitivity to tritox-30 (ddt, gamma-hch, dmdt) of tadpoles of xenopus laevis daudin and rana temporaria l]. | 1971 | 5316473 | |
| the effects of light and dark backgrounds upon indoleamine enzymes in developing xenopus laevis. | 1971 | 5317388 | |
| the distribution and development of gonadotropic activity in the pituitary of xenopus laevis. | 1971 | 5087966 | |
| the role of the lateral-line efferent system in xenopus laevis. | 1971 | 5090097 | |
| changes in the rate of incorporation of (h3)leucine in the pars intermedia of xenopus laevis at early times after change of background colour. | 1971 | 5090917 | |
| effects of change of background colour on the ultrastructure of the 'msh cells' of the pars intermedia of xenopus laevis. | 1971 | 5090918 | |
| 3,5,3'-triiodo-l-thyronine uptake and development of metamorphic competence by xenopus laevis embryonic tissues. | 1971 | 5094238 | |
| denaturation map of the ribosomal dna of xenopus laevis. | 1971 | 5099292 | |
| cytochalasin b ii: selective inhibition of cytokinesis in xenopus laevis eggs. | 1971 | 5102939 | |
| ultrastructure of diploid and haploid cells of xenopus laevis larvae. | 1971 | 5105720 | |
| a molecular approach to fertilization. i. disulfide bonds in xenopus laevis jelly coat and a molecular hypothesis for fertilization. | 1971 | 5105911 | |
| progesterone-induced maturational events in oocytes of xenopus laevis. i. continuous necessity for diffusible calcium and magnesium. | 1971 | 5113962 | |
| progesterone-induced maturational events in oocytes of xenopus laevis. ii. change in intracellular calcium and magnesium distribution at germinal vesicle breakdown. | 1971 | 5113963 | |
| the structure and function of the lateral line system in larval xenopus laevis. | 1971 | 5114041 | |
| a method for the production of pigmentless eggs in xenopus laevis. | 1971 | 5114712 | |
| expression of the paternal genes for glutamate-oxaloacetate transaminase (got) during embryogenesis in xenopus laevis. | 1971 | 5114713 | |
| lipofuscin-carrying macrophages in the brain of xenopus laevis. | 1971 | 5118760 | |
| rates of incorporation of ( 3 h)leucine into protein of the pars intermedia of the pituitary in the amphibian xenopus laevis after change of background colour. | 1971 | 5122831 | |
| chemical composition of an oestrogen-induced calcium-binding glycolipophosphoprotein in xenopus laevis. | 1. oestrogen treatment has previously been shown to induce the formation of large amounts of a serum protein, vitellogenin (xenoprotein), in xenopus laevis. vitellogenin was purified from serum by dimethylformamide precipitation and was shown to be homogeneous by a variety of electrophoretic techniques. 2. the molecular weight of vitellogenin was estimated by gel filtration to be about 6x10(5). the chemical constituents of vitellogenin were determined and lead to the characterization of this pro ... | 1971 | 5124778 |
| the effect of change of background color on the melanocyte-stimulating hormone content of the pituitary of xenopus laevis. | 1971 | 5128302 | |
| studies on the induction and biosynthesis of vitellogenin, an oestrogen-induced glycolipophosphoprotein. | 1. oestrogen treatment induces the formation of a ca(2+)-binding glycolipophosphoprotein, vitellogenin, in xenopus laevis. 2. the incorporation of l-[4,5-(3)h]-leucine into vitellogenin in vivo and in vitro was observed 12-24h after hormone treatment and increased progressively up to 21 days after treatment. 3. vitellogenin is shown to be the major protein component biosynthesized and released into the incubation medium in vitro by livers from oestrogen-treated animals. 4. the biosynthesis in vi ... | 1971 | 5131730 |
| the crystalline yolk-platelet proteins and their soluble plasma precursor in an amphibian, xenopus laevis. | a single lipophosphoprotein complex, vitellogenin, was isolated and purified from the plasma of oestrogen-stimulated female toads by preparative ultracentrifugation and chromatography on teae-cellulose (triethylaminoethylcellulose). the protein contains 12% lipid, 1.5% phosphorus, 1.6% calcium and smaller amounts of carbohydrates and biliverdin. in amino acid composition it is identical with total yolk-platelet protein. the platelet protein, however, is fractionated on teae-cellulose into two co ... | 1971 | 5131731 |
| lsd: its effect upon 5-hydroxytryptamine in embryonic development of xenopus laevis. | 1971 | 5132588 | |
| a timing study of dna amplification in xenopus laevis oocytes. | 1971 | 5133545 | |
| neurosecretion in thyroidless xenopus laevis larvae. | 1971 | 5139515 | |
| histological features of neural induction in xenopus laevis. | 1971 | 5146319 | |
| the behaviour of the egg pigment in wild-type and "rusty" tadpoles of xenopus laevis. | 1971 | 5146320 | |
| tadpole behaviour: aggregation in larval xenopus laevis. | 1971 | 5150482 | |
| a study of the regeneration of the cerebellum of xenopus laevis (daudin) in the larval stages and after metamorphosis. | 1971 | 5151353 | |
| differences in the fine structure and chemical constitution of nucleolar bodies and the true nucleolus in xenopus laevis embryos. | 1971 | 5152589 | |
| early limb development of xenopus laevis. | 1971 | 5157347 | |
| the effect of early thymectomy on histogenesis of the lymphoid organs in xenopus laevis. | 1971 | 5157348 | |
| [recessive semi-lethal tr (turner) mutation in xenopus laevis]. | 1971 | 5157429 | |
| delayed innervation of the optic tectum during development in xenopus laevis. | 1971 | 5157533 | |
| the fine structure of the cutaneous poison glands in xenopus laevis. | 1971 | 5158410 | |
| the relationship between protein synthesis and ribosomal dna amplification in xenopus laevis. | 1971 | 5160752 | |
| the preoptico-neurohypophysial neurosecretory system in thyroidless xenopus laevis larvae. | 1971 | 5165634 | |
| lactate dehydrogenase isozymes of xenopus laevis: factors affecting their appearance during early development. | 1971 | 5165791 | |
| the fine structure of intercellular junctions in the developing retina of xenopus laevis. | 1971 | 5167116 | |
| dissociation of ribosomes from oocytes of xenopus laevis into active subparticles. | ribosomes from oocytes of xenopus laevis possess low endogenous activity in vivo and in vitro, yet are readily stimulated by poly(u). the ease with which these ribosomes dissociate into active subparticles under conditions where polyribosomes and active monoribosomes are stable supports the view that the majority are unprogrammed. | 1971 | 5167141 |
| potassium inactivation in single myelinated nerve fibres of xenopus laevis. | 1971 | 5167747 | |
| an ultrastructural study of primordial germ cells, oogonia and early oocytes in xenopus laevis. | 1971 | 5168216 | |
| optic nerve fibre counts and retinal ganglion cell counts during development of xenopus laevis (daudin). | 1971 | 5206673 | |
| the haemoglobins of healthy and anaemic xenopus laevis. | 1971 | 5001386 | |
| tissue-specific mitotic inhibition in the kidneys of embryonic grafts and partially nephrectomized host xenopus laevis. | 1971 | 4933903 | |
| non-coordinated accumulation and synthesis of 5s ribonucleic acid by ovaries of xenopus laevis. | 1971 | 4939984 | |
| normal and cancerous tissue transplantation in allogenic and syngeneic xenopus laevis. | 1971 | 4941350 | |
| scanning electron microscopical studies of the embryonic surface during gastrulation and neurulation in xenopus laevis. | 1971 | 4949293 | |
| synthesis of rna by nuclei isolated from embryos of xenopus laevis at different developmental stages. | 1971 | 4950439 | |
| oestrogen biosynthesis by ovarian tissue of the south african clawed toad, xenopus laevis daudin. | 1971 | 5542999 | |
| [ultrastructure of the spinal liquor contacting neurons in the clawed toad (xenopus laevis)]. | 1971 | 5545441 | |
| the effect of intertectal neuronal connexions of rearing xenopus laevis in total darkness. | 1971 | 5548020 | |
| [biochemical studies on oogenesis. i. rna synthesis and accumulation during oogenesis of the south african toad xenopus laevis]. | 1971 | 5553364 | |
| differential growth of the neural retina in xenopus laevis larvae. | 1971 | 5553368 |