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Table 3 Nucleotide compositions of acceptor (AC) arm, D-arm, D-loop, anticodon (ANC) arm, anticodon loop, variable region, Ψ-arm, and Ψ-loop in chloroplast tRNAs

From: Evolution and structural variations in chloroplast tRNAs in gymnosperms

Region of tRNA Nucleotide composition
AC arm Number of nucleotides 0 1 2 3 4 5 6 7 8     
Number of tRNAs 3 (0.17%) 3 (0.17%) 1 (0.06%) 21 (1.18%) 18 (1.01%) 12 (0.67%) 58 (3.26%) 1659 (93.25%) 4 (0.22%)
D-arm Number of nucleotides 1 3 4           
Number of tRNAs 2 (0.11%) 609 (34.23%) 1168 (65.65%)
D-loop Number of nucleotides 6 7 8 9 10 11 12 26      
Number of tRNAs 1 (0.06%) 341 (19.17%) 281 (15.8%) 719 (40.42%) 162 (9.11%) 249 (14.00%) 25 (1.41%) 1 (0.06%)
ANC arm Number of nucleotides 4 5            
Number of tRNAs 135 (7.59%) 1664 (93.54%)
ANC loop Number of nucleotides 7 9 10 12          
Number of tRNAs 1743 (97.98%) 24 (1.35%) 2 (0.11%) 10 (0.56%)
Variable region Number of nucleotides 1 2 3 4 5 6 7 8 11 15 16 17 20
Number of tRNAs 3 (0.17%) 7 (0.39%) 97 (5.45%) 283 (15.91%) 1049 (58.97%) 225 (12.65%) 63 (3.54%) 1 (0.06%) 37 (2.08%) 1 (0.06%) 13 (0.73%) 1 (0.06%) 1 (0.06%)
Ψ-arm Number of nucleotides 4 5 6           
Number of tRNAs 11 (0.62%) 1767 (99.33%) 1 (0.06%)
Ψ-loop Number of nucleotides 7             
Number of tRNAs 1779 (100%)