Chains and heterogens:
PDB Chain Sequences:
>1g19A (A:) mtqtpdrekalelavaqieksygkgsvmrlgdearqpisviptgsialdvalgigglprg rvieiygpessgkttvalhavanaqaaggvaafidaehaldpdyakklgvdtdsllvsqp dtgeqaleiadmlirsgaldivvidsvaalvpraelegemgdshvglqarlmsqalrkmt galnnsgttaifinqlrdkigvmfgspetttggkalkfyasvrmdvrrvetlkdgtnavg nrtrvkvvknkclapfkqaefdilygkgisregslidmgvdqglirksgawftyegeqlg qgkenarnflvenadvadeiekkikeklgigavvtddpsndgvlpapvdf
>1g19A (A:) mtqtpdrekalelavaqieksygkgsvmrlgdearqpisviptgsialdvalgigglprg rvieiygpessgkttvalhavanaqaaggvaafidaehaldpdyakklgvdtdsllvsqp dtgeqaleiadmlirsgaldivvidsvaalvpraelegehvglqarlmsqalrkmtgaln nsgttaifinqltggkalkfyasvrmdvrrvetlkdgtnavgnrtrvkvvknkclapfkq aefdilygkgisregslidmgvdqglirksgawftyegeqlgqgkenarnflvenadvad eiekkikeklg