passages.id: 1.0alpha7.train.521.sent
passages.type: sentence
passages.text: Because HSP47 binds in vitro to various types of collagen (at least types I-V; Ref. 4), as well as to collagen-like proteins such as C1q,3 it appears that HSP47 may function through specific binding to the helix-forming portions of procollagen.
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