Fig. 4From: Quantitative proteomics reveals protein profiles underlying major transitions in aspen wood developmentJoint genotype effect scores from the stepwise transition PCA models. PCA model overview of the consecutive development transitions in the sampled wood, i.e. Cambium to Phloem transition: Cambium to expansion zone (ExpZone) transition: E/X1, expansion zone (ExpZone) to xylemX1 transition: X1/X2, xylemX1 to X2 transition: X2/X3, xylemX2 to X3 transition: X3/X4, xylemX3 to X4 transition: (a) The t1–t2 PCA score plot. (b) The t1–t3 PCA score plotBack to article page