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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.