Chains and heterogens:
PDB Chain Sequences:
>1l6nA (A:) garasvlsggeldkwekirlrpggkkqyklkhivwasrelerfavnpglletsegcrqil gqlqpslqtgseelrslyntiavlycvhqridvkdtkealdkieeeqnkskkkaqqaaad tgnnsqvsqnypivqnlqgqmvhqaisprtlnawvkvveekafspevipmfsalsegatp qdlntmlntvgghqaamqmlketineeaaewdrlhpvhagpiapgqmreprgsdiagtts tlqeqigwmthnppipvgeiykrwiilglnkivrmysptsilhhhhhh