منابع مشابه
Parallel Canonical Recoding
We introduce a parallel algorithm for generating the canonical signed-digit expansion of an n-bit number in Olog n time using On gates. The algorithm is similar to the computation of the carries in a carry look-ahead circuit. We also prove that if the binary number x + bx=2c is given, then the canonical signed-digit recoding of x can be computed in O1 time using On gates.
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We formalize and prove the folklore theorems that Booth recoding improves the cost and cycle time of`standard' multipliers by certain constant factors. We also analyze the number of full adders in certain 4/2-trees.
متن کاملThe distinction between recoding and codon reassignment.
IN several recent reports, the term ‘‘recoding’’ is used to describe the phenomenon of codon reassignment (e.g., Charriere et al. 2006; McCutcheon et al. 2009). McCutcheon et al. (2009) misuse the term in numerous locations, suggesting that confusion is systemic and not inadvertent. This provokes us to clarify the distinction between these two natural phenomena. Reassignment and recoding are di...
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Selenocysteine (Sec) is naturally incorporated into proteins by recoding the stop codon UGA. Sec is not hardwired to UGA, as the Sec insertion machinery was found to be able to site-specifically incorporate Sec directed by 58 of the 64 codons. For 15 sense codons, complete conversion of the codon meaning from canonical amino acid (AA) to Sec was observed along with a tenfold increase in selenop...
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RNA modifications are emerging as an additional regulatory layer on top of the primary RNA sequence. These modifications are particularly enriched in tRNAs where they can regulate not only global protein translation, but also protein translation at the codon level. Modifications located in or in the vicinity of tRNA anticodons are highly conserved in eukaryotes and have been identified as poten...
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ژورنال
عنوان ژورنال: Nature Reviews Neuroscience
سال: 2015
ISSN: 1471-003X,1471-0048
DOI: 10.1038/nrn4018