Chains and heterogens:
PDB Chain Sequences:
>1fu1A (A:) merkisrihlvsepsithflqvswektlesgfvitltdghsawtgtvseseisqeaddma mekgkyvgelrkallsgagpadvytfnfskesxyfffeknlkdvsfrlgsfnlekvenpa evirelixyxldttaenqaknehlqkenerllrdwndvqgrfekxvsakealetdlyk
>1fu1A (A:) merkisrihlvsepsithflqvswektlesgfvitltdghsawtgtvseseisqeaddma mekgkyvgelrkallsgagpadvytfnfskesyfffeknlkdvsfrlgsfnlekvenpae vireliyldttaenqaknehlqkenerllrdwndvqgrfekvsakealetdlyk
>1fu1B (B:) merkisrihlvsepsithflqvswektlesgfvitltdghsawtgtvseseisqeaddma mekgkyvgelrkallsgagpadvytfnfskesxyfffeknlkdvsfrlgsfnlekvenpa evirelixyxldttaenqaknehlqkenerllrdwndvqgrfekxvsakealetdlykrf ilvlnekktkirslhnkllnaaq
>1fu1B (B:) merkisrihlvsepsithflqvswektlesgfvitltdghsawtgtvseseisqeaddma mekgkyvgelrkallsgagpadvytfnfskesyfffeknlkdvsfrlgsfnlekvenpae vireliyldttaenqaknehlqkenerllrdwndvqgrfekvsakealetdlykrfilvl nekktkirslhnkllnaaq