( ( All proteins ) ( ( ( are chemically ) ( similar ( since ( all ( are ( ( made up ) ( of ( ( many ( amino ( acid units ) ) ) ( ( linked together ) ( in ( a ( long chain ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT All) (NNS proteins)) (VP (VBP are) (ADVP (RB chemically)) (ADJP (JJ similar) (SBAR (IN since) (S (NP (DT all)) (VP (VBP are) (VP (VBN made) (PRT (RP up)) (PP (IN of) (NP (NP (JJ many) (JJ amino) (JJ acid) (NNS units)) (VP (VBN linked) (ADVP (RB together)) (PP (IN in) (NP (DT a) (JJ long) (NN chain)))))))))))) (. .)))
All proteins are chemically similar since all are made up of many amino acid units linked together in a long chain.
(ROOT (S (NP (DT A) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN protein)) (VP (VBZ is) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (JJ amino) (NNS acids)) (VP (VBP are) (VP (VBN linked) (ADVP (RB together)) (PP (IN in) (NP (DT a) (JJ long) (NN chain))))))))) (. .)))