Fig. 1
From: Development and characterization of a eukaryotic expression system for human type II procollagen
Schematic of procollagen and collagen structures. Procollagen is purified from the cell culture medium. Post-purification enzymatic processing results in removal of the propeptides, creating a form of collagen (consisting of both triple helix and telopeptide regions) capable of self-assembly into fibrils. A portion of a collagen fibril, illustrating highly ordered lateral packing (D-banding), is shown