Presence of a vertebrate fibrinogen-like sequence in an echinoderm.

Abstract excerpt

Sequence comparisons of the three homologous polypeptide chains that compose vertebrate fibrinogens imply that the molecule evolved before the divergence of vertebrates and invertebrates, but, to our knowledge, no protein resembling vertebrate fibrinogen has even been reported from an invertebrate. We used primers based on sequences conserved between lamprey and human fibrinogens and applied the polymerase chain...

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