Immunogen sequence: GQDGVRQSRA SDKQTLLPND QLYQPLKDRE DDQYSHLQGN QLRRN. CD3G is the CD3-gamma polypeptide, which together with CD3-epsilon, -delta and -zeta, and the T-cell receptor alpha/beta and gamma/delta heterodimers, forms the T-cell receptor-CD3 co