SIV infecting Cam155/Ch-Go is a SIVcpz Ptt closely related to SIVs from Cameroon (SIVcpz Ptt -Cam13) and Gabon (SIVcpz Ptt -Gab1) across the genome. SIVcpzPtt-04Cam155 and SIVcpzPtt-09Cam155 Gag, Pol1, Pol2, and Env amino acid (aa) sequences were compared to previously published SIVgor, SIVcpz and HIV-1 references. 422 amino acids were examined for Gag analysis (up left), 700 aa for Pol1 (up right), 251 aa for Pol2 (below left), and 673 aa for Env (below right). Maximum likelihood and Bayesian analysis trees had the same topology. Here presented in black and above the branches, the bootstraps > 0.70, and the grey stars below the branches are posterior probabilities > 0.80. Scale bars represent 0.05 (Gag), 0.05 (Pol1), 0.02 (Pol2) and 0.1 (Env) replacements per site.