Chains and heterogens:
PDB Chain Sequences:
>2excX (X:) dnqfysvevgdstftvlkryqnlkpigsgaqgivcaaydavldrnvaikklsrpfqnqth akrayrelvlmkcvnhkniisllnvftpqktleefqdvylvmelmdanlcqviqmeldhe rmsyllyqmlcgikhlhsagiihrdlkpsnivvksdctlkildfglartagtsfmmtpyv vtryyrapevilgmgykenvdiwsvgcimgemvrhkilfpgrdyidqwnkvieqlgtpcp efmkklqptvrnyvenrpkyagltfpklfpdslfpadsehnklkasqardllskmlvidp akrisvddalqhpyinvwydpaeveapppqiydkqlderehtieewkeliykevmn
>2excX (X:) dnqfysvevgdstftvlkryqnlkpigsgivcaaydavldrnvaikklsrpfqnqthakr ayrelvlmkcvnhkniisllnvftpqktleefqdvylvmelmdanlcqviqmeldherms yllyqmlcgikhlhsagiihrdlkpsnivvksdctlkildfglavtryyrapevilgmgy kenvdiwsvgcimgemvrhkilfpgrdyidqwnkvieqlgtpcpefmkklqptvrnyven rpkyagltfpklfpdslfpadsehnklkasqardllskmlvidpakrisvddalqhpyin vwydpaeveapppqlderehtieewkeliykevmn