Chains and heterogens:
PDB Chain Sequences:
>1sbt_ (-) aqsvpygvsqikapalhsqgytgsnvkvavidsgidsshpdlkvaggasmvpsetpnfqd dnshgthvagtvaalnnsigvlgvapssalyavkvlgdagsgqyswiingiewaiannmd vinmslggpsgsaalkaavdkavasgvvvvaaagnegstgssstvgypgkypsviavgav dssnqrasfssvgpeldvmapgvsiqstlpgnkygayngtsmasphvagaaalilskhpn wtntqvrsslqntttklgdsfyygkglinvqaaaq