Relative expression of putative raffinose synthases for multiple soybean [glycine max (l.) Merr.] Tissues determined by quantitative rt-pcr. Left to right: the first six sets of bars represent expression of the candidate genes in williams 82 tissue. The last set of bars represent expression in mixed developing seed tissues from pi 200508. The three putative raffinose synthases are along the z-axis. Bar heights represent the average values from three replicates expressed relative to the housekeeping gene (elongation factor 1α) control.