Fig. 6.

Gene expression profiles for phenylpropanoid genes and for the chlorogenic acid biosynthetic pathway. Expression profiles for putative biosynthetic genes in C. arabica, C. canephora and C. eugenioides (left panel), as well as allele-specific expression of C^a and E^a homeologue pairs in C. arabica (right panel). The x-axis represents seed developmental stages in chronological order and the y-axis represents the gene expression level as normalized read counts. C3H, 4-coumarate 3-hydroxylase; C3′H, p-coumaroyl CoA 3-hydroxylase; C4H, trans-cinnamate 4-hydroxylase; CCoAOMT, caffeoyl-CoA 3-O-methyltransferase; 4CL, 4-coumarate-CoA ligase; COMT, caffeic acid O-methyltransferase; CSE, caffeoyl shikimate esterase; HCT, hydroxycinnamoyl-CoA:shikimate/quinate hydroxycinnamoyl transferase; HQT, hydroxycinnamoyl-CoA quinate hydroxycinnamoyl transferase; PAL, phenylalanine ammonia lyase.