3.4.15.6 cyanophycinase cyanophycin metabolism 3.4.19.5 beta-aspartyl-peptidase cyanophycin metabolism 6.3.2.29 cyanophycin synthase (L-aspartate-adding) cyanophycin metabolism 6.3.2.30 cyanophycin synthase (L-arginine-adding) cyanophycin metabolism