Before revision: mTOR inhibitors are a class of drugs that inhibit the mechanistic target of rapamycin (mTOR) , also known as the mammalian target of rapamycin , is a serine/threonine-specific protein kinase that belongs to the family of phosphatidylinositol-3 kinase (PI3K) related kinases (PIKKs).
After revision: mTOR inhibitors are a class of drugs that inhibit the mammalian target of rapamycin (mTOR) ( also known as the mechanistic target of rapamycin ), which is a serine/threonine-specific protein kinase that belongs to the family of phosphatidylinositol-3 kinase (PI3K) related kinases (PIKKs).