Chains and heterogens:
PDB Chain Sequences:
>1tfb_ (-) srammnafkeittmadrinlprnivdrtnnlfkqvyeqkslkgrandaiasaclyiacrq egvprtfkeicavsriskkeigrcfklilkaletsvdlittgdfmsrfcsnlclpkqvqm aathiarkaveldlvpgrspisvaaaaiymasqasaekrtqkeigdiagvadvtirqsyr liyprapdlfptdfkfdtpvdklpql