Specific for human BNP and proBNP (a.a.r. 11-22). Recognize BNP and proBNP in sandwich immunoassay (sensotovoty <1 pg/ml), recommended pairs for sandwich immunoassay (coating - conjugate): 50E1 - 24C5, 24C5 - 50B7, 24C5 - 57H3; reacts with proBNP and BNP in WB.