Figure 1From: Interorganellar crosstalk: new perspectives on signaling from the chloroplast to the nucleusThe pathway of chlorophyll biosynthesis. Solid arrows represent single steps; dashed arrows represent multiple steps; open arrows represent catalysis by an enzyme. Abbreviations: protogen IX, protoporphyrinogen IX; proto IX, protoporphyrin IX; MgProto, Mg-protoporphyrin IX; MgProtoME, Mg-protoporphyrin monomethyl ester; PPO, protoporphyrinogen IX oxidase.Back to article page