Goat anti-human IgM (u chain) - DyLight550 Conjugated, min. cross-reactivity to human IgA + IgG is a secondary antibody conjugated to DyLight 550, which binds to all human IgM (u chain) in immunological assays. DyLight 550 has Amax = 562 nm, Emax = 576 nm. Antibodies are are affinity purified using solid phase human IgM.DyLight is a registered trade mark of Thermofisher Inc., and its subsidaries.