Sexual health, risk behaviors, and substance use in heterosexual-identified women with female sex partners: 2002 US National Survey of Family Growth.

BACKGROUND: Despite knowledge that some people engage in same-sex sexuality without espousing a sexual minority identity, this has rarely been studied in women. METHODS: Heterosexual women aged 20 to 44 who indicated one or more female sex partners in the past year were compared to those with less recent female sex partners, and to bisexual, homosexual, and exclusively heterosexual women using 2002 US National Survey of Family Growth data. RESULTS: Compared to exclusively heterosexual women, heterosexual women with a past-year female sex partner were significantly more likely to smoke tobacco (46% vs. 19%), binge drink (34% vs. 11%), use marijuana (58% vs. 11%), and use cocaine (19% vs. 2%). Substance use was high in this group overall, but they did not differ significantly from bisexuals on tobacco use or from homosexual or bisexual women on regular alcohol consumption. Most heterosexual women with a past-year female sex partner had only one in their lifetime. They had 10 median lifetime male partners versus 1 to 7 for other groups. Whereas similar to heterosexual women with less recent female sex partners and to bisexual women on some sexual risk measures, these women were more likely than any other group to have had a non-monogamous male partner (40%) or to have engaged in sex while high (69%). Differences in sexual risk and substance use were not explained by demographic differences. CONCLUSIONS: Results suggest same-sex behavior in heterosexual-identified women is a marker for a substance use and sexual risk profile distinct from that of bisexual, lesbian, or exclusively heterosexual women.

Med19(Rox3) regulates Intermodule interactions in the Saccharomyces cerevisiae mediator complex.

The Saccharomyces cerevisiae Mediator is a 25-subunit complex that facilitates both transcriptional activation and repression. Structural and functional studies have divided Mediator subunits into four distinct modules. The Head, Middle, and Tail modules form the core functional Mediator complex, whereas a fourth, the Cyc-C module, is variably associated with the core. By purifying Mediator from a strain lacking the Med19(Rox3) subunit, we have found that a complex missing only the Med19(Rox3) subunit can be isolated under mild conditions. Additionally, we have established that the entire Middle module is released when the Deltamed19(rox3) Mediator is purified under more stringent conditions. In contrast to most models of the modular structure of Mediator, we show that release of the Middle module in the Deltamed19(rox3) Mediator leaves a stable complex made up solely of Head and Tail subunits. Both the intact and Head-Tail Deltamed19(rox3) Mediator complexes have defects in enhanced basal transcription, enhanced TFIIH phosphorylation of the CTD, as well as binding of RNA Pol II and the CTD. The largely intact Deltamed19(rox3) complex facilitates activated transcription at levels similar to the wild type Mediator. In the absence of the Middle module, however, the Deltamed19(rox3) Mediator is unable to facilitate activated transcription. Although the Middle module is unnecessary for holding the Head and Tail modules together, it is required for the complex to function as a conduit between activators and the core transcription machinery.