  We precisely position a noncanonical intron in the odd second copy of
tRNAAsp(GTC) gene in the newly sequenced crenarchaea S.acidocaldarius. The
uniform assortment of some features from normal aspartate tDNA and some from
those corresponding to non-standard amino acids conduce us to conjecture it to
be a novel tRNA gene, probably coding for a modified aspartate residue. Further
we reposition intron in tRNAHis(GUG) gene in P.aerophilum.The BHB motif at the
exon-intron boundaries are re-analyzed and found to support our conjectures.
