Function
Delta crystallin, the principal crystallin in embryonic lens, is found only in birds and reptiles. This protein also functions as an enzymatically active argininosuccinate lyase, but it has a low activity.
Sequence
MASEGDKMLGGRFVGSTDPVMEMLSASITIDQRLAEVDIQGSMAYAKALEKAGILSKSELEKTLSGLEKISEEWSKGVFVVTPTDEDIHTANERRLKELIGDIAGKLHTGRSRNDQVVTDLKLFMKNSLSVISTHLLQLIKTLVERAAIEVDVILPGYTHLQKTQPIRWSQFLLSHAVALTRDSERLGEIKKRINILPLGSGALAGNPLEIDRELLRSELDFASISLNSMDAVRQRDSVVEFLSVAALLMIHLSKMAEDLIIYSTSEFGFLTLSDTYCTGSSVMPQKKNPDSLELIRSKAGRVFGRLAAILMVLKGLPSTYNKDLQEDKEAVFDVVDTLNAVLQVATGVISTLQINKENMEKALSPEILSSDLALYLVHKGMPFRQAHVASGKAVHLAESKGITLNNLSLDDLKSISPLFGSDVSQVFNVVNSVEQYTALGGTAKSSVTAQIEQLRELLKRHKEQA