Peptide sequence: TQKQWFRETF NHLFAIANSA EAGDAGVHLV SGWQIFQSTP TEEVPFWADV Sequence homology: Cow: 86%; Dog: 93%; Horse: 93%; Human: 100%; Pig: 93%; Rabbit: 86%. DDO is a peroxisomal flavoprotein that catalyzes the oxidative deamination of D-aspartate and