( and ( ( ( A band ) containing ) ( ( contractile ( ( protein ( ( myosin and ) titin ) ) ( which ( ( extends ( from ( A band ) ) ) ( to ( Z line ) ) ) ) ) ) . ) ) )
(ROOT (S (CC and) (NP (NP (DT A) (NN band)) (VP (VBG containing))) (VP (VBP contractile) (NP (NP (NN protein) (NN myosin) (CC and) (NN titin)) (SBAR (WHNP (WDT which)) (S (VP (VBZ extends) (PP (IN from) (NP (DT A) (NN band))) (PP (TO to) (NP (NNP Z) (NN line)))))))) (. .)))
and A band containing contractile protein myosin and titin which extends from A band to Z line.
(ROOT (S (NP (DT The) (ADJP (JJS largest) (VBN known)) (NNS proteins)) (VP (VBP are) (ADJP (JJ titins))) (. .)))