esis ▁▁ ▁D - am ino ▁acid ▁ox id ase ▁is ▁used ▁in ▁bi ote chn ology ▁primarily ▁to ▁produce ▁ant ib iot ics ▁called ▁ce phal os por ins . ▁The ▁use ▁of ▁D - am ino ▁acid ▁ox id ase ▁for ▁the ▁creation ▁of ▁ant ib iot ics ▁is ▁a ▁pat ented ▁production ▁of ▁ant ib iot ics ▁and ▁started ▁in ▁ 1 9 7 0 . ▁Origin ally ▁the ▁D - am ino ▁acid ▁ox id ase ▁used ▁in ▁this ▁process ▁was ▁taken ▁from ▁a ▁p ig ’ s ▁kid ney ▁and ▁was ▁given ▁the ▁name ▁p k D AA O . ▁P k D AA O ▁is ▁very ▁un stable ▁throughout ▁the ▁processes ▁of ▁ant ib i otic ▁synth esis ▁and ▁therefore ▁gave ▁a ▁low ▁yield ▁of ▁ant ib iot ics . ▁Through ▁continued ▁research ▁a ▁more ▁successful ▁form ▁of ▁D - am ino ▁acid ▁ox id ase ▁was ▁discovered ▁from ▁a ▁ye ast ▁species ▁named ▁Rh odot or ula ▁g rac ilis ▁and ▁therefore ▁was ▁named ▁R g D AA O . ▁R g D AA O ▁is ▁now ▁used ▁as ▁the ▁primary ▁D - am ino ▁acid ▁ox id ase ▁used ▁in ▁ce phal os por in ▁ant ib iot ics ▁because ▁the ▁imm obil ization ▁on ▁commercial ▁ion ▁exchange ▁res ins ▁creates ▁a ▁more ▁stable ▁system ▁that ▁yields ▁much ▁higher ▁amounts ▁of ▁ant ib iot ics . ▁ ▁D - am ino ▁acid ▁b ios ensor ▁▁ ▁D - am ino ▁acid ▁ox id ase ▁react