Abstract
A 3.8 Kb DNA fragment, which contains the structural gene of aspartyl-tRNA synthetase (AspRS) and its flanking regions, has been fully sequenced by the combined M13/dideoxy chain terminator method. From the single open reading frame of correct length (1671 bp) we deduced an amino acid sequence consistent with that of several peptides of AspRS. No significant internal sequence repeats were observed in the primary structure of the protein. The AspRS gene (APS) has a codon usage pattern typical of non abundant proteins. S1 nuclease analysis of APS mRNA showed a major start 17 bases downstream from a "TATA box" and stops near an RNA polymerase terminator sequence.
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