Publications

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polyacrylamide gel electrophoresis of nucleic acids synthesised during the early development of xenopus laevis daudin. 19705441188
the effect of actinomycin d on nucleolar formationin early xenopus laevis gastrulae. 19705437461
[enrichment of the vegetalizing induction factor from the clawed toad (xenopus laevis) gastrula and determination of the molecular weight range by gradient centrifugation]. 19705446639
mutations affecting the size of the nucleolus in xenopus laevis. 19705451103
acid phosphatase in the tail of xenopus laevis during development and metamorphosis. 19705437469
sulphation of simple aliphatic alcohols and bile alcohols by the toad xenopus laevis. 19705500296
renal function during osmotic stress in the aquatic toad xenopus laevis. 19705466608
[sonar spectrography study of sound emission in the clawed toad, xenopus laevis]. 19705439629
inhibitory effects of colchicine on ciliogenesis in ectoderm of xenopus laevis. 19705461419
a spontaneous anaplastic intestinal metastasising carcinoma in a south african clawed toad (xenopus laevis daudin). 19705464115
transmission of the "lymphoid tumour" of xenopus laevis by injection of cell-free extracts. 19705468598
presence of caerulein in extracts of the skin of leptodactylus pentadactylus labyrinthicus and of xenopus laevis.1. the south american amphibian leptodactylus pentadactylus labyrinthicus and the south african amphibian xenopus laevis contain in their skin a polypeptide indistinguishable from caerulein prepared from the australian amphibian hyla caerulea.2. the caerulein content of different batches of leptodactylus pentadactylus labyrinthicus skins varies from 10 to 500-600 mug/g tissue. drying of the skin causes either a moderate decrease or a slight increase in the caerulein content. methanol extraction ...19705413288
on the development of the blood island in xenopus laevis embryos: light and electron microscope study. 19705495675
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. 19705500443
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 ...19705500723
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. 19705501464
differential inhibition of 28s-18s rna and 5s rna synthesis in the cycloheximide-treated xenopus laevis embryonic cells. 19705503782
slow ventral root potentials in the spinal frog (xenopus laevis). 19705505873
the re-establishment of retinotectal projections after uncrossing the optic chiasma in xenopus laevis with one compound eye. 19705511133
the nature of mitochondrial rna in oocytes of xenopus laevis and its relation to mitochondrial dna. 19705516339
[transfer of the species-specific behavior componets by xenoplastic transplantation of the brain rudiments between xenopus laevis and hymenochirus boettgeri (amphibia, anura)]. 19705517153
analysis of detergent extracts of developing xenopus laevis by microelectrophoresis. 19705518032
[histoautoradiographic studies on dna synthesis in embryos of xenopus laevis; influence of 5-fluorouracil]. 19705442893
the effect of lung ventilation on blood flow to the lungs and body of the amphibian, xenopus laevis. 19705445182
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.19705273890
an immunofluorescent study of the haemoglobins in metamorphosing xenopus laevis. 19704915509
studies of antibody formation in xenopus laevis. 19704910477
immunological maturation and lymphoreticular cancer transformation in larval xenopus laevis, the south african clawed toad. 19704912505
some characteristics of the "lymphoid tumour" inducing agent of xenopus laevis. 19704989050
a comparison between granulomatosis and lymphoreticular neoplasia in diemictylus viridescens and xenopus laevis. 19704922466
[a recessive lethal mutation, "bt" (bent tail) in xenopus laevis daudin]. 19704990885
[tolerance of cutaneous allografts in xenopus laevis. influence of the size and age of the graft]. 19704997613
lymphoreticular disorders and responses in xenopus laevis the south african clawed toad. 19704950973
the mechanism of action of gonadotrophic hormones in amphibians: the stimulation of delta5-3beta-hydroxysteroid dehydrogenase activity in testes of xenopus laevis daudin. 19704195882
rna synthesis in early oogenesis of xenopus laevis. 19704099172
the role of adenosine 3'-5'-cyclic monophosphate and catecholamines in the pigment migration process in xenopus laevis. 19704317518
kinetic studies on the biosynthesis of corticosteroids in vitro from exogenous precursors by the interrenal glands of the normal, corticotrophin-treated and adenohypophysectomized xenopus laevis daudin. 19704317284
immunoglobulin classes of the clawed toad, xenopus laevis. 19704099437
[synthesis and accumulation of rna during oogenesis in xenopus laevis]. 19704098028
[characterization of vitelline membrane dna of xenopus laevis oocytes]. 19704101936
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. 19705493990
aspects of the ultrastructure of the alimentary canal and associated glands of the xenopus laevis larva. 19705519115
oestrogen biosynthesis by ovarian tissue of the south african clawed toad, xenopus laevis daudin. 19715542999
[ultrastructure of the spinal liquor contacting neurons in the clawed toad (xenopus laevis)]. 19715545441
the post-metamorphic innervation by optic fibres of a virgin tectum in xenopus laevis. 19715574836
fine structural changes in the differentiating epidermis of xenopus laevis embryos. 19715575314
[increase in organizer cistrons for 5s rna and transfer rna in small xenopus laevis oocytes]. 19714102791
the relationship between cleavage and blastocoel formation in xenopus laevis. ii. electron microscopic observations. 19714105167
[electron microscopic demonstration of mucoproteins in mesonephron bottle cells of the xenopus laevis daudin using phosphostungstic acid staining]. 19714113742
cytokinesis and cytochalasin-induced furrow regression in the first-cleavage zygote of xenopus laevis. 19714329592
studies on xenopus laevis immunoglobulins. 19714105472
stimulation of cell division in larval kidney (xenopus laevis) by rat kidney antiserum. 19714250774
the pharmacology of efferent synapses in the lateral-line system of xenopus laevis. 19714326222
oxidative enzymes and -ketolic steroids in the interrenal cells of the south african clawed toad xenopus laevis daud. 19714400580
intracellular enzymes and -ketolic steroids of the gonads in xenopus laevis daud. 19714400579
the effect of acth and corticosteroids on carbohydrate metabolism during the metamorphosis of xenopus laevis. 19714322553
normal and cancerous tissue transplantation in allogenic and syngeneic xenopus laevis. 19714941350
scanning electron microscopical studies of the embryonic surface during gastrulation and neurulation in xenopus laevis. 19714949293
synthesis of rna by nuclei isolated from embryos of xenopus laevis at different developmental stages. 19714950439
the haemoglobins of healthy and anaemic xenopus laevis. 19715001386
3,5,3'-triiodo-l-thyronine uptake and development of metamorphic competence by xenopus laevis embryonic tissues. 19715094238
non-coordinated accumulation and synthesis of 5s ribonucleic acid by ovaries of xenopus laevis. 19714939984
tissue-specific mitotic inhibition in the kidneys of embryonic grafts and partially nephrectomized host xenopus laevis. 19714933903
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 ...19715276754
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.19715288255
early limb development of xenopus laevis. 19715157347
the effect of early thymectomy on histogenesis of the lymphoid organs in xenopus laevis. 19715157348
[recessive semi-lethal tr (turner) mutation in xenopus laevis]. 19715157429
delayed innervation of the optic tectum during development in xenopus laevis. 19715157533
the fine structure of the cutaneous poison glands in xenopus laevis. 19715158410
an ultrastructural study of primordial germ cells, oogonia and early oocytes in xenopus laevis. 19715168216
the effects of light and dark backgrounds upon indoleamine enzymes in developing xenopus laevis. 19715317388
a study of the regeneration of the cerebellum of xenopus laevis (daudin) in the larval stages and after metamorphosis. 19715151353
the relationship between protein synthesis and ribosomal dna amplification in xenopus laevis. 19715160752
lactate dehydrogenase isozymes of xenopus laevis: factors affecting their appearance during early development. 19715165791
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 ...19715289235
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 ...19715289255
[sensitivity to tritox-30 (ddt, gamma-hch, dmdt) of tadpoles of xenopus laevis daudin and rana temporaria l]. 19715316473
optic nerve fibre counts and retinal ganglion cell counts during development of xenopus laevis (daudin). 19715206673
the role of the lateral-line efferent system in xenopus laevis. 19715090097
the distribution and development of gonadotropic activity in the pituitary of xenopus laevis. 19715087966
changes in the rate of incorporation of (h3)leucine in the pars intermedia of xenopus laevis at early times after change of background colour. 19715090917
effects of change of background colour on the ultrastructure of the 'msh cells' of the pars intermedia of xenopus laevis. 19715090918
denaturation map of the ribosomal dna of xenopus laevis. 19715099292
cytochalasin b ii: selective inhibition of cytokinesis in xenopus laevis eggs. 19715102939
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 ...19715124778
the effect of change of background color on the melanocyte-stimulating hormone content of the pituitary of xenopus laevis. 19715128302
ultrastructure of diploid and haploid cells of xenopus laevis larvae. 19715105720
a molecular approach to fertilization. i. disulfide bonds in xenopus laevis jelly coat and a molecular hypothesis for fertilization. 19715105911
progesterone-induced maturational events in oocytes of xenopus laevis. i. continuous necessity for diffusible calcium and magnesium. 19715113962
progesterone-induced maturational events in oocytes of xenopus laevis. ii. change in intracellular calcium and magnesium distribution at germinal vesicle breakdown. 19715113963
a method for the production of pigmentless eggs in xenopus laevis. 19715114712
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 ...19715131730
lsd: its effect upon 5-hydroxytryptamine in embryonic development of xenopus laevis. 19715132588
expression of the paternal genes for glutamate-oxaloacetate transaminase (got) during embryogenesis in xenopus laevis. 19715114713
lipofuscin-carrying macrophages in the brain of xenopus laevis. 19715118760
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. 19715122831
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 ...19715131731
the structure and function of the lateral line system in larval xenopus laevis. 19715114041
a timing study of dna amplification in xenopus laevis oocytes. 19715133545
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