<qa>  What is the name of the group of proteins involved in metabolism of certain substances?The use of cranberry CB juice and powders, both alone and in combination with conventional medicine, has become more common for the treatment of urinary tract infections UTIs and and other acute or chronic conditions. Cytochromes P450 enzymes are a group of proteins involved in metabolism of certain substances. A group of cytochrome P-450 CYP enzymes are extensively involved in drug metabolism. The pharmacokinetics of many drugs often vary considerably among individuals, largely because of variations in the expression of different cytochrome P-450 CYP enzymes in the liver and other tissues. Flavonoids are antioxidants that may have health benefits. The flavonoids may also be responsible for cranberrys effects on urinary tract infections. 