| progesterone induced maturation in oocytes of xenopus laevis. appearance of a 'maturation promoting factor' in enucleated oocytes. | | 1973 | 4799790 |
| oestrogen-stimulated cholesterol and lipid synthesis in xenopus laevis liver. | | 1973 | 4802550 |
| regeneration electrode units: implants for recording from single peripheral nerve fibers in freely moving animals. | implantable electrode assemblies that become penetrated by regenerating axons were used to record signals from single sensory and motor nerve fibers associated with leg movement in unrestrained amphibians (xenopus laevis). such neuroimplants may provide a means for establishing the roles of various muscle afferents and efferents in posture and locomotion, and have potential clinical applications. | 1974 | 4809567 |
| double sucrose-gap method applied to single muscle fiber of xenopus laevis. | passive electrical properties (internal conductance, membrane conductance, low frequency capacity, and high frequency capacity obtained from the foot of the action potential) of normal and glycerol-treated muscle of xenopus were determined with the intracellular microelectrode technique. the results show that the electrical properties of xenopus muscle are essentially the same as those of frog muscle. characteristics of the action potential of xenopus muscle were also similar to those of frog mu ... | 1974 | 4812637 |
| the effect of catecholamines and background color on the in vitro incorporation of labeled amino acids into the neurointermediate lobe of the pituitary in xenopus laevis. | | 1974 | 4815165 |
| 5-methylcytidylic acid: absence from mitochondrial dna of frogs and hela cells. | the content of 5-methylcytidylic acid in nuclear dna and mito chondrial dna of xenopus laevis and hela cells has been determined. both nuclear dna's contain 5-methylcytidylic acid. the 5-methylcytidylic acid content of x. laevis dna is 1.7 mole percent of total nucleotides, and that of helc cell dna is 0.7 mole percent. in neither mitochondrial dna could any 5-methylcytidylic acid be detected; the limit of sensitivity was judged at below 0.1 mole percent for x. laevis dna and below 0.05 mole per ... | 1974 | 4815287 |
| incorporation of (3h)uridine and (3h)thymidine during the phase of nucleolar mutliplication in xenopus laevis oögenesis: a high-resolution autoradiographic study. | | 1974 | 4816642 |
| formation and structure of the fertilization envelope in xenopus laevis. | | 1974 | 4822839 |
| the cortical granule reaction in living eggs of the toad, xenopus laevis. | | 1974 | 4822840 |
| an ultrastructural analysis of cell and matrix differentiation during early limb development in xenopus laevis. | | 1974 | 4823502 |
| new membrane formation during cytokinesis in normal and cytochalasin b-treated eggs of xenopus laevis. ii. electrophysiological observations. | the electrical membrane potential (e(m)) and electrical membrane resistance (r(m)) were measured continuously during the first cleavage of xenopus eggs, using intracellular microelectrodes. a sharp hyperpolarization of e(m) and decrease in r(m) can be observed from 6 to 8 min after the onset of cleavage. this moment coincides with the onset of the insertion of new membrane (bluemink and de laat, 1973) leading to the formation of the interblastomeric membrane during normal cleavage. removal of th ... | 1974 | 4824285 |
| hatching in the toad xenopus laevis: morphological events and evidence for a hatching enzyme. | | 1974 | 4826290 |
| time of origin of mauthner's neuron in xenopus laevis embryos. | | 1974 | 4831106 |
| gas exchange and its effect on blood gas concentrations in the amphibian, xenopus laevis. | | 1974 | 4832998 |
| an analysis of the degree of homology between 28s rrna from xenopus laevis and xenopus mulleri. | | 1974 | 4834689 |
| polyadenylic acid-containing rna in xenopus laevis oocytes. | | 1974 | 4835729 |
| light microscope autoradiography of ribosomal dna amplification in xenopus laevis. | | 1974 | 4852996 |
| localization of 3h-benzpyrene in the cells of xenopus laevis embryos. | | 1974 | 4853030 |
| nuclear transplantation from specialized and unspecialized gut epithelial cells of adult xenopus laevis. | | 1974 | 4853387 |
| physical properties and protein constituents fo cytoplasmic and mitochondrial ribosomes of xenopus laevis. | | 1974 | 4853633 |
| purification of dna-dependent rna polymerases a and b from ovaries of xenopus laevis. | | 1974 | 4853978 |
| rna metabolism in previtellogenic oocytes of xenopus laevis. | | 1974 | 4854181 |
| the development of the retino-tectal projection in xenopus laevis: an autoradiographic and degeneration study. | | 1974 | 4854715 |
| the effect of nerve growth factor on hindlimb regeneration in xenopus laevis froglets. | | 1974 | 4854766 |
| ultrastructural features of ectodermal--mesenchymal relationships in the developing limb of xenopus laevis. | | 1974 | 4855302 |
| multiple forms of deoxyribonucleic acid-dependent ribonucleic acid polymerase in xenopus laevis. isolation and partial characterization. | | 1974 | 4855626 |
| multiple forms of deoxyribonucleic acid-dependent ribonucleic acid polymerase in xenopus laevis. levels of activity during oocyte and embryonic development. | | 1974 | 4855627 |
| dna-binding proteins of xenopus laevis: synthesis during oogenesis-ovulation and early embryogenesis. | | 1974 | 4855878 |
| a special form of deoxyribonucleic acid dependent ribonucleic acid polymerase from oocytes of xenopus laevis. isolation and characterization. | | 1974 | 4856027 |
| relationship between the amount of the 'germinal plasm' and the number of primordial germ cells in xenopus laevis. | | 1974 | 4856488 |
| on the contents of the cortical granules from xenopus laevis eggs. | | 1974 | 4856980 |
| mitochondrial dna in xenopus laevis oocytes. i. displacement loop occurrence. | | 1974 | 4857493 |
| the translation of mammalian globin mrna injected into fertilized eggs of xenopus laevis. ii. the distribution of globin synthesis in different tissues. | | 1974 | 4857973 |
| resolution of acid-soluble protein component of yolk platelets from xenopus laevis eggs on polyacrylamide gels. | | 1974 | 4857974 |
| ultrastructural changes induced by the fungicide ethylenebis (dithiocarbamic acid)disodium salt (nabm(rabam) in xenopus laevis tissues during development. | | 1974 | 4858828 |
| the in vitro development of lens from cornea of larval xenopus laevis. | | 1968 | 4868100 |
| the investigation of xenopus laevis hemoglobins during development by a fluorescent antibody. | | 1969 | 4895278 |
| ontogeny of the immune response to skin allografts in relation to lymphoid organ development in the amphibian xenopus laevis daudin. | | 1969 | 4896369 |
| [spontaneous mutations occurring in amphibians ambystoma mexicanum shaw, pleurodeles waltlii michah, and xenopus laevis daudin]. | | 1968 | 4905265 |
| hypothalamic neurosecretion and metamorphosis in xenopus laevis. ii. the effect of thyroxine following treatment with propylthiouracil. | | 1968 | 4905268 |
| fine structure of the paraventricular organ of xenopus laevis tadpoles. | | 1969 | 4907386 |
| 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 |
| light and electron microscopic studies on the pancreatic acinar and islet cells in xenopus laevis. | | 1969 | 4915196 |
| 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 |
| 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 |
| lymphoreticular disorders and responses in xenopus laevis the south african clawed toad. | | 1970 | 4950973 |
| the ultrastructure of the cortical cytoplasm in the unfertilized egg and first cleavage zygote of xenopus laevis. | | 1967 | 4951764 |
| histopathology of the cerebellum, medulla and labyrinth of xenopus laevis after high doses of total-body acute irradiation. | | 1966 | 4956877 |
| [ultrastructure of the neuro-sensorial junctions of the epidermal neuromasts of adult xenopus laevis (daudin)]. | | 1966 | 4958525 |
| [nuclear appendages of leukocytes in xenopus laevis and their modification by metabolism]. | | 1966 | 4959175 |
| antigens of the lens of xenopus laevis. | | 1968 | 4966537 |
| induction of antibodies against pure proteins in xenopus laevis daud. | | 1968 | 4966909 |
| [cytological consequences of cortical lesions in the ovum of xenopus laevis]. | | 1968 | 4969191 |
| [dissociation and reaggregation of epidermis cells of the larvae of xenopus laevis (daudin) in vitro. time-lapse cinematography and partial picture analysis]. | | 1967 | 4970711 |
| long-term persistence of bovine serum albumin when injected into the amphibian xenopus laevis daudin. | | 1968 | 4974475 |
| [development after metamorphosis of immunologic competence between cutaneous homografts in xenopus leavis daudin]. | | 1969 | 4981424 |
| [immunologic behavior in xenopus laevis in the presence of 2 different cutaneous grafts]. | | 1969 | 4981436 |
| electrical properties of cells isolated from blastula stages of the south african toad xenopus laevis. | | 1969 | 4982442 |
| [tyrosinase activity in the skin melanophores in adult xenopus laevis and in larvae of bufo bufo in different experimental conditions]. | | 1968 | 4985654 |
| 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 |
| the haemoglobins of healthy and anaemic xenopus laevis. | | 1971 | 5001386 |
| the timing of meiosis and dna synthesis during early oogenesis in the toad, xenopus laevis. | recently metamorphosed female xenopus laevis toads were injected with tritiated thymidine. animals were kept at 20 degrees c and were sacrificed 1-23 days after isotope injection. radio-autographs of squash preparations of the ovaries were made. the progress of labeled germ cell nuclei was followed to obtain information on the time course of early meiosis and extra-chromosomal dna synthesis. premeiotic s was estimated to take not more than 7 days. leptotene takes 4 days, zygotene takes 5 days, a ... | 1972 | 5009519 |
| [differentiation of tsh-cells in xenopus laevis under normal conditions and after thiouracil-treatment]. | | 1972 | 5011146 |
| the stabilizing action of prolactin on the lysosomes in tails from xenopus laevis daudin tadpoles. | | 1972 | 5016216 |
| ultrastructural features of neural induction in xenopus laevis. | | 1972 | 5016948 |
| a comparison of the ribosomal dna's of xenopus laevis and xenopus mulleri: the evolution of tandem genes. | | 1972 | 5016971 |
| the appearance, during development, of responses in the optic tectum following visual stimulation of the ipsilateral eye in xenopus laevis. | | 1972 | 5021907 |
| quantification of ultrastructural changes in the 'melanocyte-stimulating hormone cell' of the pars intermedia of the pituitary of xenopus laevis, produced by change of background colour. | | 1972 | 5024057 |
| specific cell sap requirement for peptide chain initiation in a cell-free system prepared from xenopus laevis liver. | | 1972 | 5026317 |
| [effects of hypophysectomy and thyroidectomy of larva of xenopus laevis d. on the development of intestinal epithelium]. | | 1972 | 5026888 |
| binocular interaction in the development of optokinetic reflexes in tadpoles of xenopus laevis. | | 1972 | 5028235 |
| the biosynthesis, intracellular transport, and packaging of melanocyte-stimulating peptides in the amphibian pars intermedia. | experiments in which glycine-(3)h has been introduced into excised neurointermediate lobes of xenopus laevis incubated in a modified krebs-ringer bicarbonate medium have shown that approximately 50% of the incorporated radioactivity is present in small peptides which have an electrophoretic mobility characteristic of the melanocyte-stimulating (msh) peptides shown to be elaborated within the tissue. based on these results and the demonstration that a discrete approximately 7 min pulse of the lab ... | 1972 | 5028257 |
| thin layer isoelectric focusing of the soluble lens extracts from larval stages and adult xenopus laevis. | | 1972 | 5030595 |
| an analysis of ribosomal protein during the development of xenopus laevis. | | 1972 | 5033050 |
| the growth of the retina in xenopus laevis: an autoradiographic study. ii. retinal growth in compound eyes. | | 1972 | 5039211 |
| oestrogen-stimulated lipid biosynthesis in xenopus laevis. | | 1972 | 5039238 |
| [evidence of deuterencephalic-spinocaudal induction activity in gastrula extracts of xenopus laevis after hydroxyapatite chromatography or electrofocusing]. | | 1972 | 5040082 |
| unusual yolk platelets in embryos of xenopus laevis (amphibia). | | 1972 | 5042773 |
| dna polymerase activity during maturation in xenopus laevis oocytes. | | 1972 | 5043183 |
| [biochemical studies on oogenesis. 1. intracellular rna distribution in small oocytes of xenopus laevis]. | | 1972 | 5043320 |
| [biochemical studies on oogenesis. 2. ribosome assembly during the development of oocytes in xenopus laevis]. | | 1972 | 5043321 |
| the effect of calcium on the potassium permeability in the myelinated nerve fibre of xenopus laevis. | | 1972 | 5049418 |
| intracellular calcium and cell cleavage in early embryos of xenopus laevis. | | 1972 | 5063471 |
| fine structural features of hind limb development in xenopus laevis. | | 1972 | 5070820 |
| karyotype analysis of xenopus muelleri (peters) and xenopus laevis (daudin), pipidae. | | 1972 | 5072789 |
| [influence of the optic nerve on the regeneration of the mesecephalon of xenopus laevis (daudin)]. | | 1972 | 5073712 |
| properties of the primary organization field in the embryo of xenopus laevis. i. autonomy of cell behaviour at the site of initial organizer formation. | | 1972 | 5074314 |
| properties of the primary organization field in the embryo of xenopus laevis. ii. positional information for axial organization in embryos with two head organizers. | | 1972 | 5074320 |
| properties of the primary organization field in the embryo of xenopus laevis. 3. retention of polarity in cell groups excised from the region of the early organizer. | | 1972 | 5074321 |
| [changes of electrolyte content in amphibian tissues during larval development, metamorphosis and regeneration (xenopus laevis daudin and triturus cristatus carnifex)]. | | 1972 | 5074322 |
| the development of the tectum in xenopus laevis: an autoradiographic study. | | 1972 | 5074324 |
| the effect of actinomycin d on developing pigment cells of xenopus laevis. | | 1972 | 5075789 |