ID 1.21.3.1 DE isopenicillin-N synthase. CA N-[(5S)-5-amino-5-carboxypentanoyl]-L-cysteinyl-D-valine + O2 = 2 H2O + CA isopenicillin N. CC -!- Forms part of the penicillin biosynthesis pathway. DR P05326, IPNA_EMENI ; P05189, IPNA_HAPCH ; P08703, IPNA_PENCH ; DR B6HLU0, IPNA_PENRW ; P27744, IPNS_AMYLA ; P16020, IPNS_FLASS ; DR Q48739, IPNS_LYSLA ; P10621, IPNS_STRCL ; Q53932, IPNS_STRCT ; DR Q54243, IPNS_STRGR ; P18286, IPNS_STRJU ; P12438, IPNS_STRMI ; //