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ThesisSwanson, Stella A.Recent studies suggest that species identity is of great importance in determining how herbivores structure coral reef communities. This study provides evidence that echinoid species differentially shape the community through unique feeding strategies . . .
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ArticleOppenheimer, Steven B.In this short communication, we introduce ?-cyclodextrin as a new probe to study mechanisms of adhesive interactions. We show that this cyclic polysaccharide, that consisting of six glucosyl residues linked by ?-1,4 bonds, was the only sugar of 22 tes . . . -
ArticleAsao, Michiko IreneOne approach to investigating the potential role of surface carbohydrates in mediating intercellular adhesion is to study cell reaggregation in the presence of defined concentrations of specific saccharides. Fifteen different exogenously added sacchar . . .
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ArticleLatham, Virginia HutchinsFor decades it has been assumed that in order to insert macromolecules into the embryo blastocoel for numerous experimental purposes, microinjection was required. Microinjection, however, can be only performed on a few embryos at a time, thus precludi . . .
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ArticleTully, Monica J.Many studies have examined the effects of lectins on embryonic development. Recently, it has been shown that lectins actually enter the blastocoel of sea urchin embryos without microinjection and bind to specific cell types. The present study was perf . . .
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ThesisPhan, MaiHyalin is a major glycoprotein of the hyaline layer, the extracellular matrix surrounding sea urchin embryos and is required for normal morphogenesis. It is an extremely large molecule consisting of three species ranging from 2.1x10^5-6.3x10^4. The ai . . .
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ArticleOppenheimer, Steven B.In previous studies, we have found that negatively charged, but not uncharged, amino acids and sugars block sea urchin fertilization. These studies were developed from modeling work in non-living systems using derivatized agarose beads that suggested . . .
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ArticleOppenheimer, Steven B.Sea urchin embryos incubated in sea water containing mycostatin (MST), a polyene antibiotic, dissociate into single cells. Reaggregation of dissociated sea urchin embryo cells, and uptake of labeled precursors by these cells are also greatly inhibited . . .
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ArticleOppenheimer, Steven B.The sea urchin is the material of choice for studying many early developmental events. Methods to extend the viability of sea urchin gametes have not received much attention, but it is well known that the eggs are easily damaged by freezing. This stud . . .
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ArticleKrach, Susan W.Plant lectins have been widely used to investigate the nature and functional significance of carbohydrate-containing cell surface receptor sites on normal, embryonic and tumor cells. In the present study, evidence is presented, using a quantitative el . . .