>2trtA (A:) observed residues (from ATOM records)
arlnresvidaalellnetgidglttrklaqklgieqptlywhvknkralldalaveila
rhhdyslpaageswqsflrnnamsfrrallryrdgakvhlgtrpdekqydtvetqlrfmt
engfslrdglyaisavshftlgavleqqehtaalnlppllrealqimdsddgeqaflhgl
eslirgfevqltallqiv