negative regulation of proline metabolic process +
nopaline catabolic process to proline
octopine catabolic process to proline
ornithine catabolic process via proline
positive regulation of proline metabolic process +
proline biosynthetic process +
The chemical reactions and pathways resulting in the formation of proline (pyrrolidine-2-carboxylic acid), a chiral, cyclic, nonessential alpha-amino acid found in peptide linkage in proteins.