( ( ( The ( one feature ) ) ( they ( have ( in common ) ) ) ) ( ( is ( that ( ( their ( carbon backbones ) ) ( are ( assembled ( by ( ( multienzyme complexes ) ( called ( polyketide synthases ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (CD one) (NN feature)) (SBAR (S (NP (PRP they)) (VP (VBP have) (VP (PP (IN in) (NP (JJ common)))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP$ their) (NN carbon) (NNS backbones)) (VP (VBP are) (VP (VBN assembled) (PP (IN by) (NP (NP (JJ multienzyme) (NNS complexes)) (VP (VBN called) (NP (JJ polyketide) (NNS synthases)))))))))) (. .)))
The one feature they have in common is that their carbon backbones are assembled by multienzyme complexes called polyketide synthases.
(ROOT (S (NP (NP (CD One)) (PP (IN of) (NP (NP (DT the) (JJ main) (NNS features)) (SBAR (S (NP (DT all) (NNS vetebrates)) (VP (VBP have) (VP (PP (IN in) (NP (JJ common)))))))))) (VP (VBZ is) (NP (DT a) (NN backbone))) (. .)))