Chains and heterogens:
PDB Chain Sequences:
>1s2tA (A:) mstkvkkttqlkqmlnskdlefimeahnglsarivqeagfkgiwgsglsvsaqlgvrdsn easwtqvvevlefmsdasdvpilldadtgygnfnnarrlvrkledrgvagacledklfpk tnslhdgraqpladieefalkikackdsqtdpdfcivarveafiagwgldealkraeayr nagadailmhskkadpsdieafmkawnnqgpvvivptkyyktptdhfrdmgvsmviwanh nlrasvsaiqqttkqiyddqslvnvedkivsvkeifrlqrddelvqaedkylpkn
>1s2tA (A:) vkkttqlkqmlnskdlefimeahnglsarivqeagfkgiwgsglsvsaqlgvrdsneasw tqvvevlefmsdasdvpilldadtgygnfnnarrlvrkledrgvagacledklfpktnsl hdgraqpladieefalkikackdsqtdpdfcivarveafiagwgldealkraeayrnaga dailmhskkadpsdieafmkawnnqgpvvivptkyyktptdhfrdmgvsmviwanhnlra svsaiqqttkqiyddqslvnvedkivsvkeifrlqrddelvqaedkylpkn
>1s2tB (B:) mstkvkkttqlkqmlnskdlefimeahnglsarivqeagfkgiwgsglsvsaqlgvrdsn easwtqvvevlefmsdasdvpilldadtgygnfnnarrlvrkledrgvagacledklfpk tnslhdgraqpladieefalkikackdsqtdpdfcivarveafiagwgldealkraeayr nagadailmhskkadpsdieafmkawnnqgpvvivptkyyktptdhfrdmgvsmviwanh nlrasvsaiqqttkqiyddqslvnvedkivsvkeifrlqrddelvqaedkylpkn
>1s2tB (B:) kvkkttqlkqmlnskdlefimeahnglsarivqeagfkgiwgsglsvsaqlgvrdsneas wtqvvevlefmsdasdvpilldadtgygnfnnarrlvrkledrgvagacledklfpktns lhdgraqpladieefalkikackdsqtdpdfcivarveafiagwgldealkraeayrnag adailmhskkadpsdieafmkawnnqgpvvivptkyyktptdhfrdmgvsmviwanhnlr asvsaiqqttkqiyddqslvnvedkivsvkeifrlqrddelvqaedkylpk