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Example sentences for: trnas
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When E. coli Bl21(DE3), a strain that did not express additional rare tRNAs, was transformed with the cloned T. acidophilum ATPase A subunit, no additional protein bands were observed in extracts of induced cells (not shown).
E. coli has 86 tRNAs, and most of these appear to be present in the ancestor (the parsimony criterion for presence of a tRNA in the ancestor, based on distribution in sequenced genomes, is somewhat unreliable because of sequence homology among different tRNA genes).
The production of tRNAs corresponds to the frequencies with which the different codons are present in their protein coding genes.
Currently, only the type I tRNAs [ 81 ] are included here; the tRNAs are collected in 19 functional subgroup alignments and one total type I alignment.
The Buchnera gene inventory, consisting of only 564 ORFs, 32 tRNAs and a single copy of each rRNA gene, is essentially a subset of that of E. coli [ 8].
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