... for autofluorescence using standard filter sets and illumination conditions. Validated for use in C. elegans embryos, starfish oocytes and fission yeast, SAIBR is ideal for samples with a single dominant AF source; it achieves accurate quantitation of fluorophore signal, and enables reliable detection...

... have identified the basal echinoid (cidaroid) pmar1 gene, which also promotes endomesoderm specification but not by repressing hesC . A further search for related genes demonstrated that other echinoderms have pmar1 -related genes named phb . Functional analyses of starfish Phb proteins indicated...

...Yukako Shirato; Miwa Tamura; Mitsuki Yoneda; Shin-ichi Nemoto In contrast to the somatic cell cycle, duplication of the centrioles does not occur in the second meiotic cycle. Previous studies have revealed that in starfish each of the two centrosomes in fully-grown immature oocytes consists of two...

... arrest in meiosis is poorly understood, although it is a widely observed phenomenon in invertebrates. The blockage of fully grown starfish oocytes in prophase of meiosis I is released by the hormone 1-methyladenine. It has been believed that meiosis of starfish oocytes proceeds completely without MI...

...Ritsu Kuraishi; Kenzi Osanai ABSTRACT Contribution of maternal cytoplasmic factors and cellular interaction to determination of archenteron in a starfish embryo was analyzed by (1) examining temporal and positional pattern of expression of an endoderm-specific enzyme, alkaline phosphatase, (2...

...Noboru Tsuchimori; Shigeyoshi Miyashiro; Hiroshiro Shibai; Susumu Ikegami External application of 50 μ g ml -1 adenosine inhibits development of the starfish Asterina pectinifera at the 256-cell stage when all the embryonic cells differentiate to epithelial cells. Intracellular concentration...

...M. Dan-Sohkawa; H. Yamanaka; K. Watanabe ABSTRACT Cells dissociated from swimming embryos of the starfish are able to reconstruct bipinnaria larvae. This process consists of reaggregation (stage 1), formation of the external epithelium (stage 2), development of the internal cavities which...