 EF1 guanine nucleotide exchange domain

In molecular biology, the EF1 guanine nucleotide exchange domain is a protein domain found in the beta and delta chains of elongation factors from eukaryotes and archaea.Elongation factor EF1B (also known as EF-Ts or EF-1beta/gamma/delta) is a nucleotide exchange factor that is required to regenerate EF1A from its inactive form (EF1A-GDP) to its active form (EF1A-GTP).