Position-specific amino acid preferences in collagen triple-helical domains of EPclPs, human collagens, and collagen-like proteins from different groups of organisms.

<p>The X and Y letters refer to the consensus sequence pattern (Gly-X-Y)<i>_n</i> characteristic of collagen triple-helical domains. The numbers indicate percentage occupation of the X or Y position by a given amino acid type.</p>*<p>Excluding EPclPs from bacteriophages.</p>†<p>Include molecules such as C1q, mannose binding proteins, collectins, macrophage scavenger receptors, or acetyl cholinesterase, which contain in their sequence a collagen domain but are not formally classified as collagen types.