Selection profile by eFEL and eSLAC. Selection profiles of M1 (A) and M2 (B) are shown. The abscissa indicates the codon position. The ordinate indicates the (1-p) value for each position, and is above or below the horizontal line when dN/dS > 1 or dN/dS < 1, respectively. The horizontal lines represent 0.95, so that the positions where the bars cross the lines above and below indicate the positively and negatively selcected sites, respectively. The results of eSLAC and eFEL are shown.