(A) Fibrinogen complex, showing the 3 component polypeptides FGA, FGB, and FGG. (B) Fibronectin dimer. Previously identified N-termini (red, green, or black crosses, annotated at the bottom of each panel by causative protease as appropriate) and novel N-termini (blue crosses) are shown. Disulfide bonds are shown and labeled with their amino acid location, and the isoform names (UniProt) are listed and color-coded.