International Journal of Molecular Sciences Article Synonymous Codon Usages as an Evolutionary Dynamic for Chlamydiaceae Zhaocai Li 1,†, Wen Hu 1,2,†, Xiaoan Cao 1, Ping Liu 1,3, Youjun Shang 1,* and Jizhang Zhou 1,* 1 State Key Laboratory of Veterinary Etiological Biology, ...