part of Arginine and proline metabolism procollagen L-proline + 2-Oxo-glutaric acid + O2 = procollagen trans-4-hydroxy-L-proline + Succinic acid + CO2( EC:1.14.11.2 ) L-Proline + 2-Oxo-glutaric acid + O2 => trans-4-Hydroxy-L-proline + Succinic acid + CO2( EC:1.14.11.2 ) EC:1.14.11.2 IEV:0003006 IMR:0200119 IMR:0200183 IMR:0200217 IMR:0200299 IMR:0200324 IMR:0200480 KEGG:R01252 KEGG:map00330 event