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Table 2 Frequencies of circulating 5′ tRNA halves and the gene copy number of tRNAs from which the tRNA halves were derived

From: 5′ tRNA halves are present as abundant complexes in serum, concentrated in blood cells, and modulated by aging and calorie restriction

tRNA type Gene copy number % of circulating tRNA halves
Gly 29 46%
Val 23 44%
Glu 21 8%
His 11 1%
Others* 351 < 1%
  1. * All the remaining tRNAs combined.