Chains and heterogens:
PDB Chain Sequences:
>5x18A (A:) gstivglhykigkkigegsfgvlfegtnmingvpvaikfeprkteapqlrdeyktykiln gtpnipyayyfgqeglhnilvidllgpsledlfdwcgrkfsvktvvqvavqmitliedlh ahdliyrdikpdnfligrpgqpdannihlidfgmakqyrdpktkqhipyrekkslsgtar ymsinthlgreqsrrddmealghvffyflrghlpwqglkapnnkqkyekigekkrstnvy dlaqglpvqfgryleivrslsfeecpdyegyrklllsvlddlgetadgqydwmkl
>5x18A (A:) stivglhykigkkigegsfgvlfegtnmingvpvaikfeprkteapqlrdeyktykilng tpnipyayyfgqeglhnilvidllgpsledlfdwcgrkfsvktvvqvavqmitliedlha hdliyrdikpdnfligrpgqpdannihlidfgmakqyrdpktkqhipyrekkslsgtary msinthlgreqsrrddmealghvffyflrghlpwqglkapnnkqkyekigekkrstnvyd laqglpvqfgryleivrslsfeecpdyegyrklllsvlddlgetadgqydwmkl
>5x18B (B:) gstivglhykigkkigegsfgvlfegtnmingvpvaikfeprkteapqlrdeyktykiln gtpnipyayyfgqeglhnilvidllgpsledlfdwcgrkfsvktvvqvavqmitliedlh ahdliyrdikpdnfligrpgqpdannihlidfgmakqyrdpktkqhipyrekkslsgtar ymsinthlgreqsrrddmealghvffyflrghlpwqglkapnnkqkyekigekkrstnvy dlaqglpvqfgryleivrslsfeecpdyegyrklllsvlddlgetadgqydwmkl
>5x18B (B:) stivglhykigkkigegsfgvlfegtnmingvpvaikfeprkteapqlrdeyktykilng tpnipyayyfgqeglhnilvidllgpsledlfdwcgrkfsvktvvqvavqmitliedlha hdliyrdikpdnfligrpgqpdannihlidfgmakqyrdpktkqhipyrekkslsgtary msinthlgreqsrrddmealghvffyflrghlpwqglkapnnkqkyekigekkrstnvyd laqglpvqfgryleivrslsfeecpdyegyrklllsvlddlgetadgqydwmkl