1.2.1.63 6-oxohexanoate dehydrogenase nylon-6 oligomer degradation - 2.6.1.116 6-aminohexanoate aminotransferase nylon-6 oligomer degradation - 3.5.1.46 6-aminohexanoate-oligomer exohydrolase nylon-6 oligomer degradation - 3.5.1.117 6-aminohexanoate-oligomer endohydrolase nylon-6 oligomer degradation - 3.5.2.12 6-aminohexanoate-cyclic-dimer hydrolase nylon-6 oligomer degradation -