REGULATION OF CYTOSOLIC ACETOACETYL COENZYME-A THIOLASE, 3-HYDROXY-3-METHYLGLUTARYL COENZYME-A SYNTHASE, 3-HYDROXY-3-METHYLGLUTARYL COENZYME-A REDUCTASE, AND MEVALONATE KINASE BY LOW-DENSITY LIPOPROTEIN AND BY 25-HYDROXYCHOLESTEROL IN CHINESE-HAMSTER OVARY CELLS