Results 181 to 190 of about 107,754 (235)
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Xenopus laevis

2023
Published as part of Figueroa, Alex, Low, Martyn E. Y. & Lim, Kelvin K. P., 2023, Singapore's herpetofauna: updated and annotated checklist, history, conservation, and distribution, pp.
Figueroa, Alex   +2 more
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Xenopus laevis Einstecks

Cold Spring Harbor Protocols, 2007
INTRODUCTION“Einstecks” refers to a procedure for placing a piece of tissue into the blastocoel of an early gastrula, in order to assess the inductive potential of the introduced tissue. The foreign tissue adheres to surrounding tissue and becomes incorporated into the host embryo.
Hazel L, Sive   +2 more
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Myogenesis in Xenopus laevis

Trends in Cardiovascular Medicine, 1994
The amphibian embryo provides a convenient experimental system with which to study myogenesis. The earliest steps in the formation of axial and cardiac muscle are accessible for investigation using both embryological and molecular approaches. We review the origins of skeletal and cardiac muscle in the Xenopus embryo, the molecular markers available to ...
MOHUN T   +3 more
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Protamine polymorphism in Xenopus laevis laevis

Journal of Experimental Zoology, 1987
AbstractProtamines from individual frogs of the subspecies Xenopus laevis laevis were compared by electrophoresis on polyacrylamide gels containing acetic acid, urea, and Triton X‐100 to determine if the expression of protamine genes differs among individuals. Two electrophoretic bands, SP2a and SP2b, appeared to be expressed as allelic variants. Of 33
M S, Risley, R A, Eckhardt
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Alternative housing for Xenopus laevis

Lab Animal, 2008
At the authors' facility, housing arrangements for Xenopus laevis were cumbersome and labor-intensive, requiring technicians to wash frog tanks by hand several times a week. The authors describe an alternative housing solution they implemented by modifying a rack system that was originally used to maintain zebrafish.
Jaime, White-James   +3 more
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Dejellying Xenopus laevis Embryos

Cold Spring Harbor Protocols, 2007
INTRODUCTIONThis protocol presents a method for preparing Xenopus embryos for manipulation. Embryos are surrounded by a series of thick, protective jelly membranes. Removal of these membranes is the first step in most micromanipulation procedures. These membranes must be completely removed for embryo dissection.
Hazel L, Sive   +2 more
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Synaptonemal Complexes of Xenopus laevis

Journal of Heredity, 1992
Synaptonemal complexes (SCs) have been analyzed in spread Xenopus spermatocytes and oocytes. They showed all the usual features of animal SCs in addition to a high incidence of centromere mismatching. A centriole pair is visible throughout zygotene and pachytene.
J, Loidl, D, Schweizer
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Polymely in Xenopus laevis

Nature, 1958
IN several genera of the order Anura supernumerary limbs occur naturally1. They are usually extra hind limbs2. Polymely does not appear to have been reported in the genus Xenopus. The female toad (Xenopus laevis) described here came with a consignment of toads imported from South Africa in 1956. The toad measured 8.0 cm.
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Immunoglobulin classes in Xenopus laevis

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1974
1. 1. Electrophoretically pure 19 S and 7 S immunoglobulins, designated IgMand IgG, were prepared from Xenopus laevis serum. Both immunoglobulins possessed antibody activity. 2. 2. The sedimentation coefficient for IgM is 19·5 S, for IgG 6·1 S. Reduction and alkylation of IgM yielded subunits with a sedimentation coefficient of 4·1 S. 3. 3.
R D, Jurd, G T, Stevenson
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