( ( ( What portion ) ( of ( ( the sarcomere ) ( of ( striated muscle ) ) ) ) ) ( ( would ( be ( most ( like ( ( the ( dense spots ) ) ( of ( smooth ( muscle cells ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (WP What) (NN portion)) (PP (IN of) (NP (NP (DT the) (NN sarcomere)) (PP (IN of) (NP (JJ striated) (NN muscle)))))) (VP (MD would) (VP (VB be) (NP (NP (JJS most)) (PP (IN like) (NP (NP (DT the) (JJ dense) (NNS spots)) (PP (IN of) (NP (JJ smooth) (NN muscle) (NNS cells)))))))) (. .)))
What portion of the sarcomere of striated muscle would be most like the dense spots of smooth muscle cells.
(ROOT (S (NP (DT A) (NN sarcomere)) (VP (VBZ is) (NP (NP (DT the) (JJS smallest) (NN contractile) (NN portion)) (PP (IN of) (NP (DT a) (NN muscle))))) (. .)))