Lonza's human pulmonary artery cells and media are convenient and easy to use, allowing the researcher to focus on results. Cryopreserved cells are shipped in third passage. Proliferating cells are shipped in fourth passage. CloneticsTM cells, medium and reagents are quality tested together and guaranteed to give optimum performance as a complete cell systemCryopreserved Human Pulmonary Artery Endothelial cells are guaranteed through 15 population doublings and test negative for mycoplasma, bacteria, yeast, and fungi. HIV-1, hepatitis B andhepatitis C are not detected for all donors and/or cell lots. A Certificate ofAnalysis is provided for each cell lot purchased.