Chains and heterogens:
PDB Chain Sequences:
>1a4sA (A:) aqlvdsmpsastgsvvvtddlnywggrrikskdgattepvfepatgrvlcqmvpcgaeev dqavqsaqaaylkwskmagiersrvmleaariirerrdniaklevinngktiteaeydid aawqcieyyaglaptlsgqhiqlpggafaytrreplgvcagilawnypfmiaawkcapal acgnavvfkpspmtpvtgvilaeifheagvpvglvnvvqggaetgsllchhpnvakvsft gsvptgkkvmemsaktvkhvtlelggkspllifkdcelenavrgalmanfltqgqvctng trvfvqreimpqfleevvkrtkaivvgdplltetrmggliskpqldkvlgfvaqakkega rvlcggepltpsdpklkngyfmspcvldncrddmtcvkeeifgpvmsvlpfdteeevlqr annttfglasgvftrdisrahrvaanleagtcyintysispvevpfggykmsgfgrengq atvdyysqlktvivemgdvdslf
>1a4sB (B:) aqlvdsmpsastgsvvvtddlnywggrrikskdgattepvfepatgrvlcqmvpcgaeev dqavqsaqaaylkwskmagiersrvmleaariirerrdniaklevinngktiteaeydid aawqcieyyaglaptlsgqhiqlpggafaytrreplgvcagilawnypfmiaawkcapal acgnavvfkpspmtpvtgvilaeifheagvpvglvnvvqggaetgsllchhpnvakvsft gsvptgkkvmemsaktvkhvtlelggkspllifkdcelenavrgalmanfltqgqvctng trvfvqreimpqfleevvkrtkaivvgdplltetrmggliskpqldkvlgfvaqakkega rvlcggepltpsdpklkngyfmspcvldncrddmtcvkeeifgpvmsvlpfdteeevlqr annttfglasgvftrdisrahrvaanleagtcyintysispvevpfggykmsgfgrengq atvdyysqlktvivemgdvdslf
>1a4sC (C:) aqlvdsmpsastgsvvvtddlnywggrrikskdgattepvfepatgrvlcqmvpcgaeev dqavqsaqaaylkwskmagiersrvmleaariirerrdniaklevinngktiteaeydid aawqcieyyaglaptlsgqhiqlpggafaytrreplgvcagilawnypfmiaawkcapal acgnavvfkpspmtpvtgvilaeifheagvpvglvnvvqggaetgsllchhpnvakvsft gsvptgkkvmemsaktvkhvtlelggkspllifkdcelenavrgalmanfltqgqvctng trvfvqreimpqfleevvkrtkaivvgdplltetrmggliskpqldkvlgfvaqakkega rvlcggepltpsdpklkngyfmspcvldncrddmtcvkeeifgpvmsvlpfdteeevlqr annttfglasgvftrdisrahrvaanleagtcyintysispvevpfggykmsgfgrengq atvdyysqlktvivemgdvdslf
>1a4sD (D:) aqlvdsmpsastgsvvvtddlnywggrrikskdgattepvfepatgrvlcqmvpcgaeev dqavqsaqaaylkwskmagiersrvmleaariirerrdniaklevinngktiteaeydid aawqcieyyaglaptlsgqhiqlpggafaytrreplgvcagilawnypfmiaawkcapal acgnavvfkpspmtpvtgvilaeifheagvpvglvnvvqggaetgsllchhpnvakvsft gsvptgkkvmemsaktvkhvtlelggkspllifkdcelenavrgalmanfltqgqvctng trvfvqreimpqfleevvkrtkaivvgdplltetrmggliskpqldkvlgfvaqakkega rvlcggepltpsdpklkngyfmspcvldncrddmtcvkeeifgpvmsvlpfdteeevlqr annttfglasgvftrdisrahrvaanleagtcyintysispvevpfggykmsgfgrengq atvdyysqlktvivemgdvdslf