Chains and heterogens:
PDB Chain Sequences:
>1txuA (A:) mghhhhhhgssietdrvskefieflktfhktgqeiykqtklflegmhykrdlsieeqsec aqdfyhnvaermqtrgkvppervekimdqiekyimtrlykyvfcpettddekkdlaiqkr iralrwvtpqmlcvpvnedipevsdmvvkaitdiiemdskrvprdklacitkcskhifna ikitknepasaddflptliyivlkgnpprlqsniqyitrfcnpsrlmtgedgyyftnlcc avafiekldaqslnlsqedfdrymsgqtsprkq
>1txuA (A:) etdrvskefieflktfhktgqeiykqtklflegmhykrdlsieeqsecaqdfyhnvaerm qtrgkvppervekimdqiekyimtrlykyvfcpettddekkdlaiqkriralrwvtpqml cvpvnedipevsdmvvkaitdiiemdskrvprdklacitkcskhifnaikitknepasad dflptliyivlkgnpprlqsniqyitrfcnpsrlmtgedgyyftnlccavafiekldaqs lnlsqedfdrymsg