A small, fast‐breeding, diploid relative of the frog Xenopus laevis, Xenopus tropicalis, has recently been adopted for research in developmental genetics and functional genomics.X. Available as frozen sperm, please allow 8 months for live animals. Carruthersa, S., et. Shows a small preference for NADPH over NADP(+) (By similarity). Xenopus tropicalis Taxonomy ID: 8364 (for references in articles please use NCBI:txid8364) current name. Xenopus egg extract is a lysate that is prepared by crushing the eggs of the African clawed frog Xenopus laevis.It offers a powerful cell-free (or in vitro) system for studying various cell biological processes, including cell cycle progression, nuclear transport, DNA replication and chromosome segregation.It is also called Xenopus egg cell-free system or Xenopus egg cell-free extract. XDB is a Web data catalogue of NIBB/NIG Xenopus laevis EST project. Axeldb A database focussing on gene expression in the frog Xenopus laevis. Likewise, X. tropicalis has been selected over X. laevis as the subject of a complete genome sequencing project for the same reason. Shook DR(1), Majer C, Keller R. Author information: (1)Department of Biology, University of Virginia, Gilmer Hall, Charlottesville, VA 22903, USA. Pedro's BioMolecular Research Tools A Collection of WWW Links to Information and Services Useful to Molecular Biologists. 2010). Genetic Map of Xenopus tropicalis Jamie Davies The kidney development database. Xenopus laevis and Xenopus tropicalis have been used extensively in developmental and cell biology, biochemistry, functional genomics and immunology. Xenopi cannot raise their body temperature by producing metabolic heat. Phosphatase which catalyzes the conversion of NADP(+) to NAD(+) and of NADPH to NADH (By similarity). Life cycle, evolutionary position and regenerative potential of Xenopus. and Dr. Igawa (Hiroshima Univ. Garland Publishing Inc, New York ISBN 0-8153-1896-0. Lateral line systems, usually found in fish, detect vibrations in the water. The two best-known species of this genus are Xenopus laevis and Xenopus tropicalis, which are studied as model organisms for developmental biology, cell biology, toxicology, neuroscience and for modelling human disease and birth defects. al. Pattern and morphogenesis of presumptive superficial mesoderm in two closely related species, Xenopus laevis and Xenopus tropicalis. Component of the circadian clock or downstream effector of clock function (PubMed:12573214). Xenopus laevis (XLA) is an allotetraploid species which appears to have undergone whole-genome duplication after the interspecific hybridization of 2 diploid species closely related to Silurana/Xenopus tropicalis (XTR). Probable transcription factor. Xenopus tropicalis (Gray, 1864) basionym: Silurana tropicalis Gray, 1864. homotypic synonym: Xenopus (Silurana) tropicalis. The African clawed frog (Xenopus laevis, also known as the xenopus, African clawed toad, African claw-toed frog or the platanna) is a species of African aquatic frog of the family Pipidae.Its name is derived from the three short claws on each hind foot, which it uses to tear apart its food. Exhibits a high amplitude circadian rhythm with maximal levels in early evening (PubMed:12573214). Session et al. Xenopus contains at least three sarcomeric alpha actin genes that are preferentially expressed in either heart or skeletal muscle. Garland Publishing Inc, New York ISBN 0-8153-1896-0. Reviewed-Annotation score: -Experimental evidence at transcript level i. Experiments were repeated three times. X. laevis is the species of frog most often used to generate egg extracts. Kalt MR (1976) Morphology and kinetics of spermatogenesis in Xenopus laevis. The African Clawed Frog (Xenopus laevis) is also known to tropical fish keeping enthusiasts as the Xenopus, African Clawed Toad, or African Claw Toed frog and is the only amphibian that actually has claws. Jump to: navigation, search. The early development of Xenopus Laevis, an atlas of the histology. This is the first amphibian genome to be sequenced, enabling new insights into vertebrate evolution and the last common ancestor of tetrapods. Because X. tropicalis is diploid and X. laevis is tetraploid, important inferences can be made about genome evolution. Room temperature (controlled automatically by building … A transgenic line of X. tropicalis was used to examine the process of cornea-lens transdifferentiation in which green fluorescent protein (GFP) is expressed in differentiated lens cells under the control of the Xenopus gamma1-crystallin promoter element. Reference: EXRC. Verlag der Zeitschrift für Naurforschung, Germany Google Scholar. Xenopus laevis tropicalis. 1. The word Xenopus means "strange foot" and laevis means "smooth". Xenopus tropicalis, on the other hand, possesses a diploid genome and a short generation time, ... (C and D) in stage 55 Xenopus laevis and Xenopus tropicalis tadpoles. The cardiac versus skeletal expression patterns of actins are probably sequence-dependent. The frog Xenopus laevis has provided significant insights into developmental and cellular processes. We have demonstrated here that monospermy in the clawed frog, Xenopus tropicalis, as well as in X. laevis, is ensured by a fast, electrical block to polyspermy on the egg plasma membrane after the entry of the first sperm, which is mediated by the positive-going fertilization potential. tropicalis shares advantages of X. laevis as a classic embryologic system, but its simpler genome and shorter generation time make it more convenient for multigenerational genetic, genomic, and transgenic … Robust and efficient protocols for fertilization and early embryo care of Xenopus laevis and Xenopus tropicalis are essential for experimental success, as well as maintenance and propagation of precious animal stocks. It was produced by Dr. Fukui (Faculty of Science and Engineering, Chuo Univ.) Xenopus tropicalis Taxonomy ID: 8364 (for references in articles please use NCBI:txid8364) current name. Xenopus laevis (also called the African Clawed frog due to the sharp, black claws in the hind inner three toes) is an aquatic amphibian of the Order Anuran and the family Pipidae.Xenopus are a long-lived, aquatic amphibian commonly used in teaching classrooms and in research laboratories. These dual frog species boast experimental strengths for embryology including large egg sizes that develop externally, well‐defined fate maps, and cell‐intrinsic sources of nutrients that allow explanted tissues to grow in culture. A dye exclusion assay revealed that sperm plasma membrane integrity in both species decreased after freezing, more so for … Ngn1 is expressed in the otic placode at early embryological stages (up to NF22), but with somewhat stronger expression in Xenopus tropicalis than in Xenopus laevis. Description: (Xic-GFP) 4.7 kb X. tropicalis p27 Xic1 promoter driving GFP expression in the neural tube and the eye. Xenopus tropicalis and Xenopus laevis environmental parameter standard operating procedure (Kroll lab) From Xenbase. The African clawed frog Xenopus tropicalis has several characteristics that facilitate studies of developmental and reproductive toxicity. Amphibian Research Center) through collaboration between the Xenopus Community in Japan (XCIJ) and National Bio-Resource Project (NBRP). Xenopus tropicalis (Gray, 1864) homotypic synonym: Xenopus (Silurana) tropicalis. (2016) have sequenced the genome of Xenopus laevis. It has a voracious appetite and attacks anything that passes in front of it. They must rely on external heat sources. Introduction. Xenopus laevis (African clawed frog) Status. Xenopus laevis has long been a popular model for studies of development and, ... and genetically much more convenient diploid Xenopus tropicalis (Vogel, 1999). Xenopus tropicalis has been developed as a model organism for developmental biology, ... Three ngn subfamilies (Ngnr1–3) have been isolated in both Xenopus laevis and Xenopus tropicalis (Nieber et al., 2009). Due to the tetraploid nature of Xenopus laevis, each of these three alpha actin genes is present in at least two copies. Xenopus tropicalis was somewhat less sensitive to 6‐AN, semicarbizide and atrazine when tested at 27 °C than at 23 °C. 26. Xenopus laevis is a scavenger and eats living, dead, or dying arthropods and other pieces of organic waste. Download Xenopus Genomes; X. laevis 9.2 (J-Strain) on JBrowse; X. laevis 9.2 (J-Strain) on UCSC; X. laevis 1.0 (wildtype) on JBrowse; X. tropicalis 10.0 (Nigerian) on JBrowse; X. tropicalis 9.1 (Nigerian) on JBrowse; X. tropicalis 9.1 (Nigerian) on UCSC; Xenbase UCSC Track Hub; Veenstra Lab UCSC Track Hub; Other amphibian genomes on JBrowse; Expression. … In the present study, membrane integrity and DNA stability of Xenopus laevis and Xenopus tropicalis spermatozoa were evaluated in response to cryopreservation with or without activation, a process that happens upon exposure to water to spermatozoa of some aquatic species. XenOrtho DB (Xenopus Ortholog DataBase) is a database in which ortholog genes of Xenopus tropicalis, Xenopus laevis and humans are listed. It is found in Nigeria, and from Sudan to South Africa where they are plentiful in the rivers and ponds within the southeastern portion of Sub Saharan Africa. 1. Room Environmental Parameters. Digitized images and developmental data from Nieuwkoop and Faber (1994) Normal Table of Xenopus laevis (Daudin). The rapid growth of the National Xenopus Resource has required effective implementation and optimization of these protocols. The genome of X. tropicalis has been sequenced (Hellsten et al. Xenopus laevis and Xenopus tropicalis have long been used to drive discovery in developmental, cell, and molecular biology. However, X. laevis has an allotetraploid genome precluding its use in forward genetic analysis. Silurana tropicalis Gray, 1864. Xenopus commonly known as the clawed frog) is a genus of aquatic frogs native to sub-Saharan Africa.. Twenty species are known. Procedures input by VGP link to Kroll lab Xenopus environmental procedure SOP document at Washington University animal facility: Modified format below: A. 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