MEK1⁄2 [pSpS218⁄222)⁄(pSpS222⁄226); Unconjugated Polyclonal antibody specific to Human, Mouse MEK1⁄2 [pS218⁄pS222]⁄ [pS222⁄pS226]. This antibody is validated for use in Western Blot. Anti-MEK1⁄2 [pS218⁄pS222]⁄ [pS222⁄pS226] recognizes the expressed product of the MAP2K1 gene. Catalog number 44454G is same antibody as former catalog number 44454. 44454G contains 50% glycerol, which improves the stability and longevity of this antibody.