Phenotypic resistance testing determines whether an organism is susceptible to a specific drug in a test tube. Contrast with genotype . Phosphorylation is an essential step in many cellular processes. Experimental therapies are compared with placebo in many clinical trials. Progesterone prepares the uterus for the development of the fertilized ovum and maintains the uterus throughout pregnancy.
Synthetic progesterone is used as a contraceptive.
Synthetic progestin is used as a contraceptive. Unlike reverse transcriptase inhibitors, protease inhibitors can inhibit HIV replication in cells that are already infected. SIV is similar to HIV-2.