Chains and heterogens:
PDB Chain Sequences:
>1u3fA (A:) mgsshhhhhhdydipttenlyfqghmdknalrkqilqkrmalstiekshldqkinqklva fltpkpciktialyepiknevtfvdfffeflkinqiravypkvisdteiifidqetntfe pnqidcfliplvgfnkdnyrlgfgkgyydrylmqltrqqpkigiaysfqkgdfladpwdv qldliinde
>1u3fA (A:) mdknalrkqilqkrmalstiekshldqkinqklvafltpkpciktialyepiknevtfvd fffeflkinqiravypkvisdteiifidqetntfepnqidcfliplvgfnkdnyrlgfgk gyydrylmqltrqqpkigiaysfqkgdfladpwdvqldliinde
>1u3fB (B:) mgsshhhhhhdydipttenlyfqghmdknalrkqilqkrmalstiekshldqkinqklva fltpkpciktialyepiknevtfvdfffeflkinqiravypkvisdteiifidqetntfe pnqidcfliplvgfnkdnyrlgfgkgyydrylmqltrqqpkigiaysfqkgdfladpwdv qldliinde
>1u3fB (B:) mdknalrkqilqkrmalstiekshldqkinqklvafltpkpciktialyepiknevtfvd fffeflkinqiravypkvisdteiifidqetntfepnqidcfliplvgfnkdnyrlgfgk gyydrylmqltrqqpkigiaysfqkgdfladpwdvqldliinde