with these data , taken together with previous results showing that a portion of the sequence domains of type xii collagen is similar to domains of type ix , a nonfibrillar collagen associated with cross-striated fibrils in cartilage , we suggest that types ix and xii collagens are members of a distinct class of extracellular matrix proteins found in association with quarter-staggered collagen fibrils .
C0969670
nonfibrillar collagen
C0009325
collagens