Publications

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renal function during osmotic stress in the aquatic toad xenopus laevis. 19705466608
the lateral line system at metamorphosis in xenopus laevis (daudin). 19705493274
stimulation of cell division in pronephros of embryonic grafts following partial nephrectomy in the host (xenopus laevis). 19705493275
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. 19705493280
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
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
sulphation of simple aliphatic alcohols and bile alcohols by the toad xenopus laevis. 19705500296
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
[transfer of the species-specific behavior componets by xenoplastic transplantation of the brain rudiments between xenopus laevis and hymenochirus boettgeri (amphibia, anura)]. 19705517153
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
acid phosphatase in the tail of xenopus laevis during development and metamorphosis. 19705437469
the effect of actinomycin d on nucleolar formationin early xenopus laevis gastrulae. 19705437461
the nature of mitochondrial rna in oocytes of xenopus laevis and its relation to mitochondrial dna. 19705516339
the effect of lung ventilation on blood flow to the lungs and body of the amphibian, xenopus laevis. 19705445182
accelerated synthesis of urea in xenopus laevis during osmotic stress. 19705459477
aspects of the ultrastructure of the alimentary canal and associated glands of the xenopus laevis larva. 19705519115
a spontaneous anaplastic intestinal metastasising carcinoma in a south african clawed toad (xenopus laevis daudin). 19705464115
polyacrylamide gel electrophoresis of nucleic acids synthesised during the early development of xenopus laevis daudin. 19705441188
[enrichment of the vegetalizing induction factor from the clawed toad (xenopus laevis) gastrula and determination of the molecular weight range by gradient centrifugation]. 19705446639
neurulation in xenopus laevis. an analysis and model based upon light and electron microscopy. 19705449482
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
studies of antibody formation in xenopus laevis. 19704910477
a comparison between granulomatosis and lymphoreticular neoplasia in diemictylus viridescens and xenopus laevis. 19704922466
some characteristics of the "lymphoid tumour" inducing agent of xenopus laevis. 19704989050
[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
an immunofluorescent study of the haemoglobins in metamorphosing xenopus laevis. 19704915509
lymphoreticular disorders and responses in xenopus laevis the south african clawed toad. 19704950973
immunological maturation and lymphoreticular cancer transformation in larval xenopus laevis, the south african clawed toad. 19704912505
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
the mechanism of action of gonadotrophic hormones in amphibians: the stimulation of delta5-3beta-hydroxysteroid dehydrogenase activity in testes of xenopus laevis daudin. 19704195882
[characterization of vitelline membrane dna of xenopus laevis oocytes]. 19704101936
[synthesis and accumulation of rna during oogenesis in xenopus laevis]. 19704098028
rna synthesis in early oogenesis of xenopus laevis. 19704099172
immunoglobulin classes of the clawed toad, xenopus laevis. 19704099437
composition and structure of chromosomal and amplified ribosomal dna's of xenopus laevis. 19705485907
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
[increase in organizer cistrons for 5s rna and transfer rna in small xenopus laevis oocytes]. 19714102791
studies on xenopus laevis immunoglobulins. 19714105472
cytokinesis and cytochalasin-induced furrow regression in the first-cleavage zygote of xenopus laevis. 19714329592
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
the pharmacology of efferent synapses in the lateral-line system of xenopus laevis. 19714326222
stimulation of cell division in larval kidney (xenopus laevis) by rat kidney antiserum. 19714250774
oxidative enzymes and -ketolic steroids in the interrenal cells of the south african clawed toad xenopus laevis daud. 19714400580
synthesis of rna by nuclei isolated from embryos of xenopus laevis at different developmental stages. 19714950439
tissue-specific mitotic inhibition in the kidneys of embryonic grafts and partially nephrectomized host xenopus laevis. 19714933903
non-coordinated accumulation and synthesis of 5s ribonucleic acid by ovaries of xenopus laevis. 19714939984
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
ultrastructure of diploid and haploid cells of xenopus laevis larvae. 19715105720
the distribution and development of gonadotropic activity in the pituitary of xenopus laevis. 19715087966
a method for the production of pigmentless eggs in xenopus laevis. 19715114712
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
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
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
tadpole behaviour: aggregation in larval xenopus laevis. 19715150482
the effect of change of background color on the melanocyte-stimulating hormone content of the pituitary of xenopus laevis. 19715128302
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
delayed innervation of the optic tectum during development in xenopus laevis. 19715157533
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
a study of the regeneration of the cerebellum of xenopus laevis (daudin) in the larval stages and after metamorphosis. 19715151353
differences in the fine structure and chemical constitution of nucleolar bodies and the true nucleolus in xenopus laevis embryos. 19715152589
the fine structure of the cutaneous poison glands in xenopus laevis. 19715158410
neurosecretion in thyroidless xenopus laevis larvae. 19715139515
lactate dehydrogenase isozymes of xenopus laevis: factors affecting their appearance during early development. 19715165791
the behaviour of the egg pigment in wild-type and "rusty" tadpoles of xenopus laevis. 19715146320
histological features of neural induction in xenopus laevis. 19715146319
the haemoglobins of healthy and anaemic xenopus laevis. 19715001386
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
cytochalasin b ii: selective inhibition of cytokinesis in xenopus laevis eggs. 19715102939
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
3,5,3'-triiodo-l-thyronine uptake and development of metamorphic competence by xenopus laevis embryonic tissues. 19715094238
denaturation map of the ribosomal dna of xenopus laevis. 19715099292
the structure and function of the lateral line system in larval xenopus laevis. 19715114041
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
lsd: its effect upon 5-hydroxytryptamine in embryonic development of xenopus laevis. 19715132588
the fine structure of intercellular junctions in the developing retina of xenopus laevis. 19715167116
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.19715167141
potassium inactivation in single myelinated nerve fibres of xenopus laevis. 19715167747
the preoptico-neurohypophysial neurosecretory system in thyroidless xenopus laevis larvae. 19715165634
the role of the lateral-line efferent system in xenopus laevis. 19715090097
progesterone-induced maturational events in oocytes of xenopus laevis. ii. change in intracellular calcium and magnesium distribution at germinal vesicle breakdown. 19715113963
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
early limb development of xenopus laevis. 19715157347
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
the effects of light and dark backgrounds upon indoleamine enzymes in developing xenopus laevis. 19715317388
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