the center of the protein has an 8-fold repeat of a 13 amino acid sequence whose general motif is -glu3- ( lys/arg ) 2-ala2-glu2- ( lys/arg ) 1-x- ( lys/arg ) 1-ala1- , where x is glu , gln , or ala .
C0061472
glu
C0017797
gln