( ( Later ( in ( the ( cell cycle ) ) ) ) ( , ( ( during ( DNA replication ) ) ( , ( ( ( these ( same ( repressed ( heterochromatin portions ) ) ) ) ( of ( the genome ) ) ) ( ( ( display ( ( a ( late phase ) ) ( of ( DNA synthesis ) ) ) ) ( compared ( to ( ( the rest ) ( of ( ( the genome ) ( -LRB- ( 20 -RRB- ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB Later) (PP (IN in) (NP (DT the) (NN cell) (NN cycle)))) (, ,) (PP (IN during) (NP (NN DNA) (NN replication))) (, ,) (NP (NP (DT these) (JJ same) (JJ repressed) (NN heterochromatin) (NNS portions)) (PP (IN of) (NP (DT the) (NN genome)))) (VP (VBP display) (NP (NP (DT a) (JJ late) (NN phase)) (PP (IN of) (NP (NN DNA) (NN synthesis)))) (PP (VBN compared) (PP (TO to) (NP (NP (DT the) (NN rest)) (PP (IN of) (NP (NP (DT the) (NN genome)) (PRN (-LRB- -LRB-) (NP (CD 20)) (-RRB- -RRB-)))))))) (. .)))
Later in the cell cycle, during DNA replication, these same repressed heterochromatin portions of the genome display a late phase of DNA synthesis compared to the rest of the genome (20).
(ROOT (S (PP (IN During) (NP (NP (DT the) (NN synthesis) (NN phase)) (PP (IN in) (NP (DT the) (NN cell) (NN cycle))))) (, ,) (NP (NN dna) (NN replication)) (VP (VBZ occurs)) (. .)))