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Full-Text Articles in Life Sciences
Ultrasound Detection By Clupeiform Fishes, David A. Mann, Dennis M. Higgs, William N. Tavolga, Marcy J. Souza, Arthur N. Poppera
Ultrasound Detection By Clupeiform Fishes, David A. Mann, Dennis M. Higgs, William N. Tavolga, Marcy J. Souza, Arthur N. Poppera
Biological Sciences Publications
It has previously been shown that at least one species of fish ~the American shad! in the order clupeiforms ~herrings, shads, and relatives! is able to detect sounds up to 180 kHz. However, it has not been clear whether other members of this order are also able to detect ultrasound. It is now demonstrated, using auditory brainstem response ~ABR!, that at least one additional species, the gulf menhaden ~Brevoortia patronus!, is able to detect ultrasound, while several other species including the bay anchovy ~Anchoa mitchilli!, scaled sardine ~Harengula jaguana!, and Spanish sardine ~Sardinella aurita! only detect sounds to about 4 …
Identification Of New X-Chromosomal Genes Required For Drosophila Oogenesis And Novel Roles For Fs(1)Yb, Brainiac And Dunce, Andrew Swan, Sirine Hijal, Andres Hilfiker, Beat Suter
Identification Of New X-Chromosomal Genes Required For Drosophila Oogenesis And Novel Roles For Fs(1)Yb, Brainiac And Dunce, Andrew Swan, Sirine Hijal, Andres Hilfiker, Beat Suter
Biological Sciences Publications
We performed a screen for female sterile mutations on the X chromosome of Drosophila melanogaster and identified new loci required for developmental events in oogenesis as well as new alleles of previously described genes. We present mapping and phenotypic characterization data for many of these genes and discuss their significance in understanding fundamental developmental and cell biological processes. Our screen has identified genes that are involved in cell cycle control, intracellular transport, cell migration, maintenance of cell membranes, epithelial monolayer integrity and cell survival or apoptosis. We also describe new roles for the genesdunce (dnc), brainiac (brn) andfs(1)Yb, and we …
Xpitx1 Plays A Role In Specifying Cement Gland And Head During Early Xenopus Development, Wy Chang, Farhad Khosrowshahian, R Chang, Michael J. Crawford
Xpitx1 Plays A Role In Specifying Cement Gland And Head During Early Xenopus Development, Wy Chang, Farhad Khosrowshahian, R Chang, Michael J. Crawford
Biological Sciences Publications
Xenopus Pitx1 is a homeobox gene whose family members are structurally and functionary conserved in organisms as diverse as Drosophila, chick, mouse, human, and frog. Present as a maternal transcript, the gene is zygotically expressed during gastrulation in a dorsal streak of cells. This streak restricts to a small circular domain underlying the center of presumptive neural plate. Shortly thereafter, a crescent of expression develops at the border of anterior neural ectoderm, and as the central plate domain diminishes, the crescent coalesces to define the presumptive cement gland. Expression remains high throughout cement gland development, and subsequently expands to include …