( ( PYD ( ( is also ) ( found ( ( ( ( ( in ( ( type ( II collagen ) ) ( of cartilage ) ) ) , ) but ) because ) ( of ( ( ( ( the ( ( comparatively larger ) mass ) ) ( of ( bone collagen ) ) ) and ) ( ( the ( slower ( turnover rate ) ) ) ( of ( cartilage collagen ) ) ) ) ) ) ) ) ) ( , ( ( ( most ( PYD excreted ) ) ( in ( the urine ) ) ) ( ( originates ( in bone ) ) . ) ) ) )
(ROOT (S (S (NP (NNP PYD)) (VP (VBZ is) (ADVP (RB also)) (VP (VBN found) (PP (PP (IN in) (NP (NP (NN type) (NNP II) (NNP collagen)) (PP (IN of) (NP (NN cartilage))))) (, ,) (CC but) (RB because) (PP (IN of) (NP (NP (NP (DT the) (ADJP (RB comparatively) (JJR larger)) (NN mass)) (PP (IN of) (NP (NN bone) (NN collagen)))) (CC and) (NP (NP (DT the) (JJR slower) (NN turnover) (NN rate)) (PP (IN of) (NP (NN cartilage) (NN collagen)))))))))) (, ,) (NP (NP (JJS most) (NNP PYD) (NN excreted)) (PP (IN in) (NP (DT the) (NN urine)))) (VP (VBZ originates) (PP (IN in) (NP (NN bone)))) (. .)))
PYD is also found in type II collagen of cartilage, but because of the comparatively larger mass of bone collagen and the slower turnover rate of cartilage collagen, most PYD excreted in the urine originates in bone.
(ROOT (S (NP (JJ Lamprey) (NN cartilage)) (VP (VBZ contains) (NP (DT no) (NN collagen))) (. .)))