FIGURE 2.

Distribution of imino acid triplets followed by non-imino acid triplets in type III collagen. Collagen sequences are categorized into stretches of m imino acid triplets followed by n non-imino acid triplets (m+n triplet pattern) (a); Frequency of m+n triplet pattern in human type III collagen (b). Type III collagen contains 87 such stretches (excluding 8 terminal triplets), while only 7 stretches (striped bar) contain at least 2 imino acid triplets followed by at least 3 non-imino acid triplets and could be potential collagenase cleavage sites.