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Biosynthesis pathways of the three main PLs of P. falciparum (PC, PE, and PS) at the intraerythrocytic stage. Dashed arrows correspond to nonenzymatic steps. The “?” indicates that the enzyme activity was reported but the gene is not yet identified. CK, choline kinase; CCT, CTP:phosphocholine cytidylyltransferase; CEPT, choline/Etn-phosphotransferase; ECT, CTP:phosphoethanolaminecytidylyltransferase; EK, Etn kinase; PPi, pyrophosphate; SD, serine decarboxylase.
