Figure 3.

Distribution of carnation transcripts in the chlorophyll biosynthesis and degradation pathways. Previously published sequences in GenBank belonging to the pathways of chlorophyll biosynthesis and degradation were used in BLAST searches to identify genes in the carnation EST database. Names of enzymes (or subunits, in the case of Mg chelatase) are followed in parentheses by the number of contigs in different families of genes encoding these enzymes. HemA, glutamyl-tRNA reductase; Gsa, glutamate-1-semialdehyde 2,1-aminomutase; HemB, 5-aminolevulinate dehydratase; HemC, hydroxymethylbilane synthase; HemD, uroporphyrinogen III synthase; HemE, uroporphyrinogen III decarboxylase; HemF, coproporphyrinogen III oxidase; HemG, protoporphyrinogen IX oxidase; ChlH, Mg chelatase H subunit; ChlI, Mg chelatase I subunit; ChlD, Mg chelatase D subunit; ChlM, Mg-proto IX methyltransferase; Crd1, Mg-proto IX monomethylester cyclase; DVR, divinyl-protochlorophyllide reductase; Por, protochlorophyllide reductase; ChlG, chlorophyll synthase; Cao, chlorophyllide a oxygenase; Nycl, chlorophyll b reductase; CLH, chlorophyllase; PaO, pheophorbide a oxygenase; Acd2, RCCR reductase.