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. 2011 Apr 7;6(4):e18230. doi: 10.1371/journal.pone.0018230

Figure 1. Genes involved in anthocyanin biosynthesis.

Figure 1

The anthocyanin biosynthetic pathway consists of six core genes (below the solid line). We also examined a gene upstream from the ABP, phenylalanine ammonia lyase (PAL), and a side-branch enzyme that produces flavonols, flavonol synthase (FLS). The ABP can be divided into early and late halves based on the step that produces flavonols (dotted line). The core enzymes are abbreviated as follows: chalcone synthase (CHS), chalcone isomerase (CHI), flavanone-3-hydroxylase (F3H), dihydroflavonol 4-reductase (DFR), anthocyanidin synthase (ANS) and UDP glucose flavonoid 3-O-glucosyltransferase (UF3GT).