Chains and heterogens:
PDB Chain Sequences:
>1fbiH (H:) qvqlqqpgaelvkpgasvklsckasgytftsywmhwvkqgpgqglewigeidpsdsypny nekfkgkatltvdkssstaymqlssltsedsavyycaslyyygtsygvldywgqgtsvtv ssakttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlq sdlytlsssvtvpssprpsetvtcnvahpasstkvdkkivp
>1fbiL (L:) diqmtqttsslsaslgdrvtiscrasqdisnylnwyqkkpdgtvklliyytsrlhsgvps rfsgsgsgtdysltirnleqediatyfcqqgytlpytfgggtkleikradaaptvsifpp sseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstlt ltkdeyerhnsytceathktstspivksfnrnec
>1fbiP (P:) diqmtqttsslsaslgdrvtiscrasqdisnylnwyqkkpdgtvklliyytsrlhsgvps rfsgsgsgtdysltirnleqediatyfcqqgytlpytfgggtkleikradaaptvsifpp sseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysmsstlt ltkdeyerhnsytceathktstspivksfnrnec
>1fbiQ (Q:) qvqlqqpgaelvkpgasvklsckasgytftsywmhwvkqgpgqglewigeidpsdsypny nekfkgkatltvdkssstaymqlssltsedsavyycaslyyygtsygvldywgqgtsvtv ssakttppsvyplapgsaaqtnsmvtlgclvkgyfpepvtvtwnsgslssgvhtfpavlq sdlytlsssvtvpssprpsetvtcnvahpasstkvdkkivp
>1fbiX (X:) kvfgrcelaaamkrhgldnyrgyslgnwvcaakfesnfnsqatnrntdgstdygvlqins rwwcndgrtpgsrnlcnipcsalqssditatancakkivsdgngmnawvawrkhckgtdv rvwikgcrl
>1fbiY (Y:) kvfgrcelaaamkrhgldnyrgyslgnwvcaakfesnfnsqatnrntdgstdygvlqins rwwcndgrtpgsrnlcnipcsalqssditatancakkivsdgngmnawvawrkhckgtdv rvwikgcrl