during the erythrocytic cycle was provided by the developmental arrest in early schizogony triggered by 16352702 the ectopic expression of PfCDPK1’s auto-inhibitory junction domain in P. falciparum. However, the interpretation of these results is confounded by the potential for non-specific effects. For example, the ectopically expressed junction domain may bind and inhibit related kinases required during intra-erythrocytic development. Future work will focus on distinguishing between the two proposed models using additional genetic tools. Our work reveals redundancy in the Plasmodium kinome and will influence future attempts to develop drugs that target multiple CDPK homologs to increase their efficacy. TACCATTA and inserted into the previously generated plasmid using XhoI.The final insert was released from the targeting construct using NotI and EcoRI. Transfections of the targeting plasmid into PbA TRAP/FlpL parasites were carried out using standard methodology. Transfected parasites were selected using pyrimethamine and cloned by limiting dilution. Parasites were passaged into Anopheles stephensi mosquitoes. Mosquito Cycles Anopheles stephensi mosquitoes 
were fed on CDPK1- infected or CDPK1cKO-infected Swiss-webster mice. CDPK1 cKO-infected mosquitoes were maintained at 20uC until day 12411425 14 post bloodmeal and then transferred to 25uC. PbA TRAP/FlpL parasites were used as controls. Sporozoites were dissected from their salivary glands at days 1821 post EW-7197 site feeding. Infectivity of salivary glands was similar for cKO and control parasites at approximately 10000 15,000 sporozoites/mosquito. Midguts were dissected from CDPK1- infected mosquitoes at day 9 post blood meal. Southern Hybridization and Diagnostic PCR Parasite genomic DNA was digested with BamHI and SpeI before transfer to a nylon membrane. The membrane was probed with dioxygenin-labeled exon 5. DNA hybridization was visualized using a chemiluminescent substrate, following the manufacturer’s instructions. Infection of HepG2 Cells and Merosome Assay Sporozoites obtained at day 1821, post-bloodmeal were added to HepG2 cells cultured on collagen-coated coverslips. Cells were fixed at 40 hours or 65 h post-infection with 4% paraformaldehyde followed by permeabilization with cold methanol. Infected cells were identified using immunostaining with an anti-Hsp70 LS mAb. Merosomes were obtained from infected cultures by collecting the media at 6670 h post-infection and counted in a hemocytometer. Generation of CDPK1 cKO Parasites In vivo Infection Swiss-webster mice were injected intravenously with CDPK1 cKO or FlpL/TRAP sporozoites or erythrocytic stage parasites from CDPK1- or WT. Parasitemia was determined daily through microscopic examination of Giemsa stained thin smears. Leishmania are protozoan parasites responsible for a variety of human diseases ranging from simple self-healing cutaneous leishmaniasis to the fatal visceral form of the disease. According to the World Health Organization more than 12 million people in,88 countries have leishmaniasis, with approximately 12 million new cases annually adding to the existing global burden of disease. Most of the countries where these diseases are endemic are developing countries, and these diseases are frequently associated with poverty, malnutrition and environmental changes. Leishmania have a digenetic life-cycle existing as extracellular flagellated promastigotes in sand fly vectors; and as intracellular aflagellated amastigotes in the macrop