( ( ( Cell ( cycle synchronization ) ) ( of ( ( skin ( fibroblast cells ) ) ( in ( ( four species ) ( of family ) ) ) ) ) ) ( felidae . ) )
(ROOT (S (NP (NP (JJ Cell) (NN cycle) (NN synchronization)) (PP (IN of) (NP (NP (NN skin) (NN fibroblast) (NNS cells)) (PP (IN in) (NP (NP (CD four) (NNS species)) (PP (IN of) (NP (NN family)))))))) (VP (VBP felidae)) (. .)))
Cell cycle synchronization of skin fibroblast cells in four species of family felidae.
(ROOT (S (NP (NNS Cells)) (VP (VBP have) (NP (CD four) (NNS cycles))) (. .)))