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Correspondence analysis has allowed us to reveal a constraint exerting its influence on all of the codons, whatever the amino acid: the probability of use of one codon ending by C varies along the genome. This probability is maximum near the "D-long" and decreases following the heavy strand in the 5'-3' direction. It reaches a minimum in the region(More)
A characteristic profile of fluctuations in the use of codons is seen in bacteriophages, Mammal mitochondria and animal viruses. Following DNA in the direction of transcription, one goes slowly from an area rich in codons ending by C to an area rich in codons ending by T and then one falls abruptly in an area rich in C. The termination of transcription is(More)
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