3d image of proline skeletal formula

proline pyrrolidine-2-carboxylic acid pro proteinogenic amino biosynthesis proteins group secondary amine aliphatic pyrrolidine glutamate l-proline glycine receptor ionotropic glutamate receptors cis-trans isomerization tautomer isomer stereoisomer metabolite metabolism cycle mechanism pathway biosynthetic biogenesis substrate precursor synthesis derivative bioprecursor metabolic enzyme endogenous molecule molecular formula skeletal structural structure cell biology biochemistry biomolecule bioactive biochemical 3d