Provided below are ELISA kits targeting monocyte to macrophage differentiation associated, a human protein encoded by MMD. This protein is 238 amino acids long, with a mass of 27.7 kDa, and is a member of the ADIPOR family. Other alias names for this protein include: monocyte to macrophage differentiation factor, macrophage maturation-associated, monocyte to macrophage differentiation protein, progestin and adipoQ receptor family member 11, MMA, MMD1, and PAQR11.