In some species of sea urchin, such as Lytechinus variegatus beta-1, 3-glucanase activity is present at two distinct developmental stages (in the unfertilized egg and again following gastrulation). There is a different form of the enzyme beta-1, 3-glucanase specific to each stage, and these forms ca
Effect of 1,3;1,6-β-D-glucans on Developing Sea Urchin Embryos
✍ Scribed by Marina I. Kiseleva; Larissa A. Balabanova; Valery A. Rasskazov; Tatiana N. Zvyagintseva
- Publisher
- Springer
- Year
- 2008
- Tongue
- English
- Weight
- 117 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1053-6426
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A P-D-glucan isolated from a Japanese marine alga known as "Arame" (Eisenia bicyclis) was shown by methylation analysis to be composed of (l-3) and (l-+6) linkages and ( 1+3),(1+6) branch points. The 13C-n.m.r. spectrum confirmed these linkages and also verified the absence of /3-( l-+4) linkages. T
## Abstract Exposure of early sea urchin embryos to 5‐bromodeoxyuridine (at concentrations up to 100 μg per ml) severely decreases the uptake of exogenous ^3^H‐uridine into RNA. However, the actual gross rate of DNA or RNA synthesis in these embryos appears not to be affected by the presence of 5‐b