>1g19A (A:) observed residues (from ATOM records)
mtqtpdrekalelavaqieksygkgsvmrlgdearqpisviptgsialdvalgigglprg
rvieiygpessgkttvalhavanaqaaggvaafidaehaldpdyakklgvdtdsllvsqp
dtgeqaleiadmlirsgaldivvidsvaalvpraelegehvglqarlmsqalrkmtgaln
nsgttaifinqltggkalkfyasvrmdvrrvetlkdgtnavgnrtrvkvvknkclapfkq
aefdilygkgisregslidmgvdqglirksgawftyegeqlgqgkenarnflvenadvad
eiekkikeklg