The Streptococcus pyogenes orphan protein tyrosine phosphatase, SP-PTP, possesses dual specificity and essential virulence regulatory functions.
Kant S, Agarwal S, Pancholi P, Pancholi V. The Streptococcus pyogenes orphan protein tyrosine phosphatase, SP-PTP, possesses dual specificity and essential virulence regulatory functions. Mol Microbiol. 2015 Aug; 97(3):515-40.