CLUSTAL 2.1 multiple sequence alignment

a               AAAAA-----AAAAA-----AAAAA---------------AAAAA-----AAAAA----- 
r               AAAAAAAAAAAAAAAAAAAAAAAAA----------AAAAAAAAAAAAAAAAAAAAAAAAA 
b               -----AAAAA-----AAAAA-----AAAAA-----AAAAA-----AAAAA-----AAAAA 

