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- W2001755886 abstract "Abstract The enzyme β-1,3-glucanase is contained in the unfertilized eggs of most species of sea urchin. In some species, including Lytechinus variegatus , there is also substantial activity following gastrulation, and during remaining larval development. To determine if the same form of β-1,3-glucanase is present in both unfertilized eggs and after gut differentiation, an affinity purification procedure was utilized to isolate enzyme from unfertilized Lytechinus eggs. β-1,3-Glucanase is a 70,000-Da protein in this species, similar to the molecular weight of enzyme isolated from Strongylocentrotus purpuratus . Purified enzyme was used to generate an antibody that specifically recognized a 70,000-Da protein in unfertilized eggs by Western blot analysis, and stained the cortical granules of unfertilized eggs by immunofluorescence. The antibody also specifically immunoprecipitated β-1,3-glucanase activity from egg sonicates. The antibody was used to demonstrate that the form of β-1,3-glucanase present following gastrulation is antigenically distinct from the egg form. The 70,000-Da protein recognized by the antibody was no longer present by 24 hr, but embryos of this and later stages contained substantial amounts of activity, indicating the enzyme at these stages differs from the egg-specific form. In addition, the antibody was not capable of immunoprecipitating enzyme activity from pluteus sonicates. β-1,3-Glucanase has been partially purified from pluteus stage embryos, and appears to be a complex of approximately 200,000 Da. The enzyme is specific to endoderm and appears following differentiation of the gut, suggesting that it may function in larval digestion." @default.
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- W2001755886 date "1986-09-01" @default.
- W2001755886 modified "2023-09-27" @default.
- W2001755886 title "Two antigenically distinct forms of β-1,3-glucanase in sea urchin embryonic development" @default.
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- W2001755886 doi "https://doi.org/10.1016/0012-1606(86)90370-2" @default.
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