RT Journal
A1 Itzkovitz, Shalev
A1 Alon, Uri
T1 The genetic code is nearly optimal for allowing additional information within protein-coding sequences
JF Genome Research 
JO Genome Research 
YR 2007 
FD February 01 
VO 17 
IS 2 
SP 000 
OP 000 
DO 10.1101/gr.5987307 
UL http://genome.cshlp.org/content/early/2007/02/01/gr.5987307.abstract 
AB DNA sequences that code for proteins need to convey, in addition to the protein-coding information, several different signals at the same time. These “parallel codes” include binding sequences for regulatory and structural proteins, signals for splicing, and RNA secondary structure. Here, we show that the universal genetic code can efficiently carry arbitrary parallel codes much better than the vast majority of other possible genetic codes. This property is related to the identity of the stop codons. We find that the ability to support parallel codes is strongly tied to another useful property of the genetic code—minimization of the effects of frame-shift translation errors. Whereas many of the known regulatory codes reside in nontranslated regions of the genome, the present findings suggest that protein-coding regions can readily carry abundant additional information.