Chains and heterogens:
PDB Chain Sequences:
>1sub_ (-) aqsvpygvsqikapalhsqgytgsnvkvavidsgidsshpdlkvaggasmvpsetnpfqd nnshgthvagtvaalnnsigvlgvapsaslyavkvlgadgsgqyswiingiewaiannmd vinmslggpsgsaalkaavdkavasgvvvvaaagnegtsgssstvgypgkypsviavgav dssnqrasfssvgpeldvmapgvsiqstlpgnkygaysgtcmasphvagaaalilskhpn wtntqvrsslentttklgdsfyygkglinvqaaaq