Learn More
Members of bone morphogenetic proteins (BMPs) play important roles in many aspects of vertebrate embryogenesis. In developing limbs, BMPs have been implicated in control of anterior-posterior patterning, outgrowth, chondrogenesis, and apoptosis. These diverse roles of BMPs in limb development are apparently mediated by different BMP receptors (BMPR). To(More)
Vertebrate embryos are sensitive to retinoic acid, either in deficiency or in excess. Although all-trans retinoic acid (RA) and 9-cis RA are known to have distinct but overlapping activities in higher organisms, only the all-trans isomer has been investigated in detail as a teratogen in zebrafish. We have identified profound and specific effects of 9-cis RA(More)
The gradient diver method has been adapted to measure photosynthesis during the early development of a single zygote of the multicellular green alga Ulva mutabilis Føyn. The cells have only one chloroplast, and the results indicate that during growth of the chloroplast the rate of O(2)-production increases linearly in the early part of the cell cycle but(More)