Chains and heterogens:
PDB Chain Sequences:
>1n4kA (A:) ggdvvrlfhaeqekfltcdehrkkqhvflrttgrqsatsatsskalwevevvqhdpcrgg agywnslfrfkhlatghylaaevdpdfeeeclefqpsvdpdqdasrsrlrnaqekmvysl vsvpegndissifeldpttlrggdslvprnsyvrlrhlctntwvhstnipidkeeekpvm lkigtsplkedkeafaivpvspaevrdldfandaskvlgsiagklekgtitqnerrsvtk lledlvyfvtggtnsgqdvlevvfskpnrerqklmreqnilkqifkllqapftdcgdgpm lrleelgdqrhapfrhicrlcyrvlrhsqqdyrknqeyiakqfgfmqkqigydvlaedti tallhnn
>1n4kA (A:) ggdvvrlfhaeqekfltcdehrkkqhvflrttgrqsatsatsskalwevevvqlfrfkhl atghylaaevdmvyslvsvpegndissifeldpyvrlrhlctntwvhstnipidkeeekp vmlkigtsplkedkeafaivpvspaevrdldfandaskvlgsiagklekgtitqnerrsv tklledlvyfvtggtnsgqdvlevvfskpnrerqklmreqnilkqifkllqapfthapfr hicrlcyrvlrhsqqdyrknqeyiakqfgfmqkqigydvlaedtitallhnn