>1ykbB (B:) SEQRES residues shcrldksnfqqpyitnrtfmlakeasladnntdvrligeklfhgvsmsercylmkqvln ftleevlfpqsdrfqpymqevvpflarlsnrlstchiegddlhiqrnvqklkdtvkklge sgeikaigeldllfmslrnaci