>1w73C (C:) observed residues (from ATOM records)
tealqskffsplqkamlppnsfqgkvafitgggtglgkgmttllsslgaqcviasrkmdv
lkataeqissqtgnkvhaiqcdvrdpdmvqntvselikvaghpnivinnaagnfispter
lspnawktitdivlngtafvtleigkqlikaqkgaaflsittiyaetgsgfvvpsasaka
gveamskslaaewgkygmrfnviqpgpikttgtfekemigripcgrlgtveelanlaafl
csdyaswingavikfdggeevlisgefndlrkvtkeqwdtieel