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The cDNAs of rainbow trout and zebrafish eIF2α have been isolated and found to encode proteins of similar molecular weight and isoelectric point to the α-subunit of the human translational initiation factor, eIF2. The rainbow trout (36.0kDa) and zebrafish (36.2kDa) eIF2αs share 93 and 91% identity to the human protein, respectively, and are recognized by antibodies raised to the human form. In mammals,...