It is the family of 50 powerful enzymes known as Cytochrome P450 that is responsible for converting cholesterol into the 'master' steroid hormone, pregnenolone. I choose to call pregnenolone a 'master hormone' because it is converted into numerous other vital hormones.
Mayweather has been arrested several times since 2002 in battery and violence cases in Las Vegas and in his hometown of Grand Rapids, Mich. He was convicted in 2002 of misdemeanor battery stemming from a fight with two women at a Las Vegas nightclub.
The Pacquaio bout marks the fifth fight of the deal, and Mayweather is expected to fight again in September. But this is boxing, and retirement is a fickle concept. Mayweather, in fact, supposedly retired once before â following his win over Oscar De La Hoya in May 2007. He was back in the ring seven months later.