Ml. Lewis et al., REDUCTION OF DELTA(1)-PYRROLINE-2-CARBOXYLIC ACID TO PROLINE BY AN ESCHERICHIA-COLI PROLINE AUXOTROPH, Bioorganic & medicinal chemistry letters, 3(6), 1993, pp. 1189-1192
A new synthesis of DELTA1-pyrroline-2-carboxylic acid 2 and various is
otopomers is described; the conversion of 2 to proline by Escherichia
coli is shown to proceed by a direct reduction.