Chains and heterogens:
PDB Chain Sequences:
>1au7A (A:) gmraleqfanefkvrriklgytqtnvgealaavhgsefsqtticrfenlqlsfknacklk ailskwleeaeqvgalynekvganerkrkrrttisiaakdalerhfgehskpssqeimrm aeelnlekevvrvwfcnrrqrekrvk
>1au7A (A:) gmraleqfanefkvrriklgytqtnvgealaavhgsefsqtticrfenlqlsfknacklk ailskwleeaeqkrrttisiaakdalerhfgehskpssqeimrmaeelnlekevvrvwfc nrrqrekrvk
>1au7B (B:) gmraleqfanefkvrriklgytqtnvgealaavhgsefsqtticrfenlqlsfknacklk ailskwleeaeqvgalynekvganerkrkrrttisiaakdalerhfgehskpssqeimrm aeelnlekevvrvwfcnrrqrekrvk
>1au7B (B:) gmraleqfanefkvrriklgytqtnvgealaavhgsefsqtticrfenlqlsfknacklk ailskwleeakrrttisiaakdalerhfgehskpssqeimrmaeelnlekevvrvwfcnr rqrekrvk