The nature and positioning of the weak bonding forces primarily mediating the stereochemical recognition between amino acids and their encoding nucleobases was plausibly imposed by their respective, intrinsic molecular configurations, thereby allowing a computation of the specific assignments of amino acids to doublets of nucleobases chosen as those of the vestigial anticodons and originally «frozen» by phosphoramidate bondings on polyphosphate chains to conserve the nascent genetic code.