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Which tissues are they found in? —Preceding unsigned comment added by 129.67.21.28 ( talk) 16:40, 21 February 2008 (UTC) reply

Every tissue. They are synthesized (just like all the other coagulatie factoren I, II, III etc.) in the liver. When there's an injury all these factors get there, fibronectin just as much as fibrin.

I would be interested in seeing an expansion on the topic of embryonic lethality, it seems a bit truncated. Otherwise I would like to see this article bumped up to a C class it is more complete that a start.

--BearBait 18:31, 16 January 2018 (UTC) — Preceding unsigned comment added by GTF17 ( talk • contribs)