https://www.bio-rad-antibodies.com/monoclonal/human-cd3-antibody-okt3-mca6146.html
Anti Human CD3 Antibody, clone OKT3 | Bio-Rad
Mouse anti Human CD3 antibody, clone OKT3, recognizes T-cell surface glycoprotein CD3 epsilon chain (CD3ε), also known as T-cell surface antigen T3/Leu-4 ...