FIGURE 7.

Molecular loci of glycosylated hydroxylysine residues in α1(I) and α2(I) chains of type I collagen synthesized by MC3T3-E1 cells. Note that the glycosylated Hyl residues were identified exclusively in the N-terminal helical region of the α chains and that the extent of the modifications varies depending on the locus. telo, telopeptide; L, lysine; H, hydroxylysine; G, galactosylhydroxylysine; GG, glucosylgalactosylhydroxylysine. Gray squares, lysine or hydroxylysine residues; black squares, glycosylated hydroxylysine residues.