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Wilehm Roux Arch Dev Biol
1979 Mar 01;1861:65-70. doi: 10.1007/BF00848108.
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Ultrastructure of collagen in sea urchin embryos.
Crise-Benson N
,
Carl Benson S
.
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Collagen fibrils with a main period banding of 610 Å and 220 Å in width were observed in the blastocoel of 72-h embryos of the sea urchin,Strongylocentrotus purpuratus. Non-striated fibrils of 50 Å diameter were also observed. The collagen is seen in highest concentration in the vicinity of mesenchyme cells which are richly endowed with endoplasmic reticulum and secretory vesicles. A role for collagen in cell attachment, orientation and spicule formation is discussed.
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