Chains and heterogens:
PDB Chain Sequences:
>1q90A (A:) ypvfaqqnyanpreangrivcanchlaqkaveievpqavlpdtvfeavielpydkqvkqv langkkgdlnvgmvlilpegfelappdrvpaeikekvgnlyyqpyspeqknilvvgpvpg kkysemvvpilspdpaknknvsylkypiyfggnrgrgqvypdgkksnntiynasaagkiv aitalsekkggfevsiekangevvvdkipagpdlivkegqtvqadqpltnnpnvggfgqa eteivlqnpariqgllvffsfvlltqvllvlkkkqfekvqlaemnfhhhhhh
>1q90B (B:) mskvydwfeerleiqaiadditskyvpphvnifyciggitftcflvqvatgfamtfyyrp tvaeafasvqyimtdvnfgwlirsihrwsasmmvlmmvlhvfrvyltggfkrpreltwvt gvimavctvsfgvtgyslpwdqvgywavkivtgvpdaipgvggfivellrggvgvgqatl trfyslhtfvlplltavfmlmhflmirkqgisgpl
>1q90B (B:) vydwfeerleiqaiadditskyvpphvnifyciggitftcflvqvatgfamtfyyrptva eafasvqyimtdvnfgwlirsihrwsasmmvlmmvlhvfrvyltggfkrpreltwvtgvi mavctvsfgvtgyslpwdqvgywavkivtgvpdaipgvggfivellrggvgvgqatltrf yslhtfvlplltavfmlmhflmirkqgisgpl
>1q90C (C:) qaakdalgndikagewlkthlagdrslsqglkgdptylivtadstiekyglnavcthlgc vvpwvaaenkfkcpchgsqynaegkvvrgpaplslalahcdvaesglvtfstwtetdfrt glepwwa
>1q90C (C:) qaakdalgndikagewlkthlagdrslsqglkgdptylivtadstiekyglnavcthlgc vvpwvaaenkfkcpchgsqynaegkvvrgpaplslalahcdvaeglvtfstwtetdfrtg lepwwa
>1q90D (D:) msvtkkpdlsdpvlkaklakgmghntygepawpndllymfpvvilgtfacviglsvldpa amgepanpfatpleilpewyfypvfqilrvvpnkllgvllmaavpaglitvpfiesinkf qnpyrrpiatilfllgtlvavwlgigstfpidisltlgl
>1q90D (D:) tkkpdlsdpvlkaklakgmghntygepawpndllymfpvvilgtfacviglsvldpaamg epanpfatpleilpewyfypvfqilrvvpnkllgvllmaavpaglitvpfiesinkfqnp yrrpiatilfllgtlvavwlgigstfpidisltlgl
>1q90G (G:) mvepllcgivlglvpvtiaglfvtaylqylrgdlaty
>1q90G (G:) mvepllcgivlglvpvtiaglfvtaylqyl
>1q90L (L:) mltitsyvglligalvftlgiylgllkvvkli
>1q90M (M:) geaefiagtaltmvgmtlvglaigfvllrveslveegki
>1q90M (M:) eaefiagtaltmvgmtlvglaigfvllrveslve
>1q90N (N:) gepaivqigwaatcvmfsfslslvvwgrsgl
>1q90R (R:) aassevpdmnkrnimnlilaggaglpittlalgygaffvppssgggggg
>1q90R (R:) ssevpdmnkrnimnlilaggaglpittlalgygaffvpp