In the canonical collagen Xaa-Yaa-Gly triad (where Xaa and Yaa are any amino acid), a proline occupying the Yaa position is hydroxylated to give a Xaa-Hyp-Gly sequence.
Na tríade canónica do coláxeno Xaa-Yaa-Gly (onde Xaa e Yaa representan a calquera aminoácido), unha prolina que ocupe a posición Yaa hidrolízase para orixinar a secuencia Xaa-Hyp-Gly.