ut am yl trans fer ase ▁() ▁is ▁an ▁en zym e ▁that ▁catal y zes ▁the ▁chemical ▁reaction ▁ ▁L - gl ut am ine ▁+ ▁D - al an ine ▁ ▁N H 3 ▁+ ▁g amma - L - gl ut am yl - D - al an ine ▁ ▁Thus , ▁the ▁two ▁substr ates ▁of ▁this ▁en zym e ▁are ▁L - gl ut am ine ▁and ▁D - al an ine , ▁whereas ▁its ▁two ▁products ▁are ▁N H 3 ▁and ▁g amma - L - gl ut am yl - D - al an ine . ▁ ▁This ▁en zym e ▁belongs ▁to ▁the ▁family ▁of ▁transfer ases , ▁specifically ▁the ▁am ino ac yl trans fer ases . ▁ ▁The ▁system atic ▁name ▁of ▁this ▁en zym e ▁class ▁is ▁L - gl ut am ine : D - al an ine ▁g amma - gl ut am yl trans fer ase . ▁ ▁References ▁▁▁▁ ▁Category : EC ▁ 2 . 3 . 2 ▁Category : En zym es ▁of ▁unknown ▁structure <0x0A> </s> ▁The ▁Don ▁g ud geon ▁( G ob io ▁bre vic ir ris ) ▁is ▁a ▁species ▁of ▁g ud geon , ▁a ▁small ▁fresh water ▁in ▁the ▁family ▁Cy pr in idae . ▁It ▁is ▁w ides p read ▁in ▁Europe ▁in ▁the ▁Don ▁River ▁system ▁in ▁Russia ▁and ▁Ukraine . ▁It ▁is ▁a ▁fresh water ▁dem ers al ▁fish , ▁up ▁to ▁ 1 0   cm ▁long