Chains and heterogens:
PDB Chain Sequences:
>1um6H (H:) vqlqqsgpvlvkpggsvkmsckaseytltsylfqwvkqksgqglewigyiypynggtryn ekfrgkatltsdkssntaylelssltsedsavyycarssmsdpganwgpgtlvtvssast kgpsvfplapsskstsggtaalgclvkdyfpepvtvswnsgaltsgvhtfpavlqssgly slssvvtvpssslgtqtyicnvnhkpsntkvdkkvep
>1um6L (L:) ldiqmtqspsslsaslgervsltcrasqeisgylywlqqkpdgtikrliyagstldsgvp krfsgsrsgsdysltisslesedfadyyclqyasyprtfgggtkveikrtvaapsvfifp psdeqlksgtasvvcllnnfypreakvqwkvdnalqsgnsqesvteqdskdstyslsstl tlskadyekhkvyacevthqglsspvtksfnrgecgaga