cultured rpe cells , but not choroidal/scleral fibroblasts , produced labelled peptides which were characterized as alpha 1 ( iv ) , and alpha 2 ( iv ) collagen chains by cm-cellulose chromatography , sds-page , proline : hydroxyproline ratios and sensitivity to bacterial collagenase .
C0033382
proline
C0020388
hydroxyproline