>4r1rB (B:) observed residues (from ATOM records)
llvtkrdgsterinldkihrvldwaaeglhnvsisqvelrshiqfydgiktsdihetiik
aaadlisrdapdyqylaarlaifhlrkkaygqfeppalydhvvkmvemgkydnhlledyt
eeefkqmdtfidhdrdmtfsyaavkqlegkylvqnrvtgeiyesaqflyilvaaclfsny
pretrlqyvkrfydavstfkislptpimsgvrtptrqfsscvliecgdsldsinatssai
vkyvsqragiginagriralgspirggeafhtgcipfykhfqtavksasqggvrggaatl
fypmwhlevesllvlknnrgvegnrvrhmdygvqinklmytrllkgeditlfspsdvpgl
ydaffadqeeferlytkyekddsirkqrvkavelfslmmqerastgriyiqnvdhcnths
pfdpaiapvrqsnlcleialptkplndvndengeialctlsafnlgainnldeleelail
avraldalldyqdypipaakrgamgrrtlgigvinfayylakhgkrysdgsannlthktf
eaiqyyllkasnelakeqgacpwfnettyakgilpidtykkdldtianeplhydwealre
sikthglrnstlsalmpsetssqisnatngiepprgyvsikaskdgilrqvvpdyehlhd
ayellwempgndgylqlvgimqkfidqsisantnydpsrfpsgkvpmqqllkdlltaykf
gvktlyyqntrdg