Proline:  synthesis from ornithine, citrulline, or arginine.
D001120:Arginine; D002956:Citrulline; D009952:Ornithine; D011392:Proline
D002956:Citrulline; D001120:Arginine; D011392:Proline; D009952:Ornithine
ARGININE; CITRULLINE; PROLINE/preparation of