Dev Biol 1988 Jan 01;1251:187-94.

Endogenous lectin secretion into the extracellular matrix of early embryos of Xenopus laevis.

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An endogenous galactoside-binding lectin with subunit molecular weight of 43,000-45,000, previously detected in unfertilized eggs of Xenopus laevis, persists at high levels in embryos through gastrulation. During embryonic development the lectin is found in cytoplasmic vesicles, and then is secreted into extracellular matrix which is prominent around the blastopore and on the roof of the blastocoel. The lectin is also found in the extracellular material in the developing neural fold. The presence of lectin at sites of active morphogenetic movements raises the possibility that it participates in the formation of an extracellular matrix that influences these processes.

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