EIF2S2, EIF2, EIF2B

eIF-2 functions in the early steps of protein synthesis by forming a ternary complex with GTP and initiator tRNA. This complex binds to a 40S ribosomal subunit, followed by mRNA binding to form a 43S preinitiation complex. Junction of the 60S ribosomal subunit to form the 80S initiation complex is preceded by hydrolysis of the GTP bound to eIF-2 and release of an eIF-2-GDP binary complex. In order for eIF-2 to recycle and catalyze another round of initiation, the GDP bound to eIF-2 must exchange with GTP by way of a reaction catalyzed by eIF-2B. Structure of the beta subunit of translational initiation factor eIF-2. The DNA sequence and comparative analysis of human chromosome 20. The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).