Chains and heterogens:
PDB Chain Sequences:
>1irk_ (-) vfpssvfvpdewevsrekitllrelgqgsfgmvyegnardiikgeaetrvavktvnesas lrerieflneasvmkgftchhvvrllgvvskgqptlvvmelmahgdlksylrslrpeaen npgrppptlqemiqmaaeiadgmaylnakkfvhrdlaarncmvahdftvkigdfgmtrdi yetdyyrkggkgllpvrwmapeslkdgvfttssdmwsfgvvlweitslaeqpyqglsneq vlkfvmdggyldqpdncpervtdlmrmcwqfnpkmrptfleivnllkddlhpsfpevsff hseenk
>1irk_ (-) ssvfvpdewevsrekitllrelgqgsfgmvyegnardiikgeaetrvavktvnesaslre rieflneasvmkgftchhvvrllgvvskgqptlvvmelmahgdlksylrslrpeaennpg rppptlqemiqmaaeiadgmaylnakkfvhrdlaarncmvahdftvkigdfgmtrdiyet dyyrkggkgllpvrwmapeslkdgvfttssdmwsfgvvlweitslaeqpyqglsneqvlk fvmdggyldqpdncpervtdlmrmcwqfnpkmrptfleivnllkddlhpsfpevsffhse enk