Recognizes a protein of 21 kDa, identified as tissue inhibitor of metalloproteinases-2 (TIMP-2) . It is closely related to TIMP-1 and shows the highest binding affinity to both the latent (pro) and active forms of 72 kDa Type IV collagenase (also known as MMP-2 or gelatinase A) . It also has affinity for the active form of 92 kDa Type IV collagenase (also known as MMP-9 or gelatinase B) . TIMP-2 inhibits the proteolytic invasiveness of tumor cells and normal placental trophoblast cells. Primary antibodies are available purified, or with a selection of fluorescent CF® Dyes and other labels. CF® Dyes offer exceptional brightness and photostability. Note: Conjugates of blue fluorescent dyes like CF®405S and CF®405M are not recommended for detecting low abundance targets, because blue dyes have lower fluorescence and can give higher non-specific background than other dye colors.