Table 1. Comparison of chloroplast genomic characteristics between the four cupressophytes.

Taxa	Amentotaxus argotaenia (KR780582)	Sciadopitys verticillata (KT601210)	Cephalotaxus wilsoniana (NC_016063)	Taxus mairei (NC_020321)
Genome size (bp)	136657	138284	136196	127665
Protein-coding genes (%)	55.08	55.26	56.78	50.12
tRNA genes (%)	1.82	1.80	1.61	1.57
rRNA genes (%)	3.37	3.4	3.27	3.58
Introns (%)	8.78	9.12	9.15	10.34
Spacers (%)	30.95	30.4	29.19	34.37
Gene density (no. of gene/Kb)	0.88	0.87	0.85	0.88
GC content (%)
Genome	35.85	35.42	35.08	34.72
Protein-coding genes	36.90	36.35	36.04	36.76
tRNA genes	53.31	52.79	52.94	52.36
rRNA genes	52.99	52.45	52.14	52.57
Introns	36.10	35.93	35.08	34.63
Spacers	31.03	30.65	30.29	29.97