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Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

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Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

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Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Operator, Repressor Operator, Repressor
Operator using personal protection equipment. Operator using personal protection equipment.
Structural model of the Cro dimer–operator complex Structural model of the Cro dimer–operator complex
Arithmetic Progression Arithmetic Progression
Models of the lac repressor and its binding to operator sites in DNA Models of the lac repressor and its binding to operator sites in DNA
Constitutive operator (OC) mutations Constitutive operator (OC) mutations
Video: Requirements for nervous signals

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