Chains and heterogens:
PDB Chain Sequences:
>4tmkA (A:) rskyivieglegagkttarnvvvetleqlgirdmvftrepggtqlaeklrsllldiksvg devitdkaevlmfyaarvqlvetvikpalangtwvigdrhdlstqayqgggrgidqhmla tlrdavlgdfrpdltlyldvtpevglkrarargeldrieqesfdffnrtrarylelaaqd ksihtidatqpleavmdairttvthwvkel