Fig. 3

Codon contents of 20 amino acids and stop codons in all protein-coding genes of four Subtribe Swertiinae species chloroplast genomes. The top panel shows the RSCU for the corresponding amino acids. The colored block represents different codons, which are shown in the panel below. (Note: 1 represents Halenia elliptica; 2 represents Swertia tetraptera; 3 represents S. mussotii; 4 represents Veratrilla baillonii; A represents Alanine; C represents Cysteine; D represents Aspartic acid; E represents Glutamic acid; F represents Phenylalanine; G represents Glycine; H represents Histidine; I represents Isoleucine; K represents Lysine; L represents Leucine; M represents Methionine; N represents Asparagine; P represents Proline; Q represents Glutamine; R represents Arginine; S represents Serine; U represents Threonine; V represents Valine; W represents Tryptophan; Y represents Tyrosine)