REAGENT KIT, ALINITY C ULTRA HDL (1400TESTS/EA) The Alinity c Ultra HDL assay is used for the quantitation of high density lipoprotein (HDL) cholesterol in human serum or plasma on the Alinity c analyzer The Ultra HDL assay is a homogeneous method for directly measuring HDL cholesterol concentrations in serum or plasma without the need for off-line pretreatment or centrifugation steps