The CD3D protein is an important component of the TCR-CD3 complex on T lymphocytes and is critical for adaptive immune responses. After APC activates TCR, CD3D, together with CD3E, CD3G and CD3Z, transmits signals through ITAM and activates downstream pathways. CD3D-CD3E Heterodimer Protein, Mouse (HEK293, Flag-His) is a recombinant protein dimer complex containing mouse-derived CD3D-CD3E Heterodimer protein, expressed by HEK293 , with C-His, C-Flag labeled tag. CD3D-CD3E Heterodimer Protein, Mouse (HEK293, Flag-His), has molecular weight of ~20 & 22 kDa, respectively.