Human SIRP alpha ELISA Kit (CD172a) is a single-wash 90-min Simplestep used to quantify Human SIRP alpha (CD172a) with a sensitivity of 76,9 pg/ml. The assay uses a simple mix-wash-read protocol with just one incubation and one wash step. - Colorimetric Sandwich ELISA - 450 nm readout : works on any standard plate reader.