This is a public front-end for the HIV coreceptor genotyping method based on position-specific scoring matrices (PSSM), as described in Jensen, Li, van 't Wout et al. 2003 [pdf] and Jensen, Coetzer, van 't Wout et al. 2006 [pdf]. For the matrices described in these papers, this site is intended to deliver the same predictions as for the original site, WebPSSM.