Figure 3From: Selection of reference genes for quantitative RT-PCR studies in Rhipicephalus (Boophilus) microplus and Rhipicephalus appendiculatus ticks and determination of the expression profile of Bm86Optimal number of control genes for normalization as determined by geNorm for R. microplus (white bars), R. appendiculatus (black bars) and in a combined analysis (grey bars).Back to article page