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Variation in nucleotide composition of the anti-codon arms of cyanobacterial tRNAs. The anti-codon arm of canonical tRNA possesses five nucleotides. However, some of the cyanobacterial tRNAs were found to possess three, four or six nucleotides in the anti-codon arm. The anti-codon arm of Chroococcidiopsis thermalis PCC 7203 (gene id: 2503612106) contained three nucleotides, and that of Nostoc sp. PCC 7524 (gene id: 2509813153) contained six nucleotides
