( ( The mRNA ) ( ( ( ( ( is , ) ( in turn ) ) , ) ( ( translated ( on ( a ribosome ) ) ) ( into ( ( a chain ) ( of ( ( amino acids ) ( otherwise ( known ( as ( a polypeptide ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN mRNA)) (VP (VBZ is) (, ,) (PP (IN in) (NP (NN turn))) (, ,) (S (VP (VBN translated) (PP (IN on) (NP (DT a) (NN ribosome))) (PP (IN into) (NP (NP (DT a) (NN chain)) (PP (IN of) (NP (NP (JJ amino) (NNS acids)) (VP (ADVP (RB otherwise)) (VBN known) (PP (IN as) (NP (DT a) (NN polypeptide))))))))))) (. .)))
The mRNA is, in turn, translated on a ribosome into a chain of amino acids otherwise known as a polypeptide.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (DT a) (NN chain)) (PP (IN of) (NP (JJ amino) (NNS acids)))) (VP (VBZ reaches) (NP (DT a) (NN stop) (NN codon))))) (, ,) (VP (VBN released) (PP (IN from) (NP (DT the) (NN ribosome)))) (. .)))