All of the following are examples of post? translational modifications of collagen or its precursors EXCEPT
A) glycosylation of hydroxylysine.
B) hydroxylation of proline.
C) oxidation of lysine to allysine.
D) phosphorylation of tyrosine.
E) proteolytic processing of procollagen.

Question

Quizplus · Accepted Answer

Phosphorylation of tyrosine is not a known post-translational modification of collagen or its precursors. The other options are all known modifications of collagen or its precursors. Glycosylation of hydroxylysine and hydroxylation of proline are important for stability of the collagen triple helix. Oxidation of lysine to allysine is crucial for the formation of intermolecular crosslinks in mature collagen, and proteolytic processing of procollagen is necessary to remove N- and C-terminal propeptides to generate mature collagen.

All of the Following Are Examples of Post? Translational Modifications