Chains and heterogens:
PDB Chain Sequences:
>2at9_ (-) grpewiwlalgtalmglgtlyflvkgmgvsdpdakkfyaittlvpaiaftmylsmllgyg ltmvpfggeqnpiywaryadwlfttplllldlallvdadqgtilalvgadgimigtglvg altkvysyrfvwwaistaamlyilyvlffgftskaesmrpevastfkvlrnvtvvlwsay pvvwligsegagivplnietllfmvldvsakvgfglillrsr