Subunit of the eukaryotic elongation factor 1 complex (eEF1). Probably plays a role in anchoring the complex to other cellular components (By similarity). Protein biosynthesis; polypeptide chain elongation. The eukaryotic elongation factor 1 complex (eEF1) is probably a heterohexamer. Two trimeric complexes, each composed of eEF1A (TEF1 or TEF2), eEF1Balpha (EFB1) and eEF1Bgamma (CAM1 or TEF4), are probably dimerized via the eF1Bgamma subunits. The eEF1B subcomplex with the GEF activity is formed of eEF1Balpha and eEF1Bgamma. TEF4 interacts with EFB1 (By similarity). Present with 102130 molecules/cell in log phase SD medium.