SULT1A2 and infection: The stp2Δ mutant strain SVC23 was attenuated in virulence compared to the STP2 complemented or the wild type strain SVC21 (Fig. 10), with a mean time to death of 2.4 days for the wild-type strain compared to 5.9 days for the mutant strain, indicating that Stp2p is required for full virulence in this animal model of infection.