Comparison of Xenopus MMP3 with human MMP1, 3, and 10. Note that the shadowed region at the end of the catalytic domain corresponds to the same region in Fig. 2 except the insertion of 8–14 aa in stromelysins (MMP3, 10) compared to collagenases (e.g., the MMP1 shown here). See Fig. 2 for other information.