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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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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

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Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

Consequences of normal and inadequate iodine in the diet. Consequences of normal and inadequate iodine in the diet.
Sickled and normal red blood cells Sickled and normal red blood cells
Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s
Placenta previa. The condition is caused by the development of the placenta over the cervical canal, Placenta previa. The condition is caused by the development of the placenta over the cervical canal,
2 Several oxygen-binding curves: for normal hemoglobin 2 Several oxygen-binding curves: for normal hemoglobin
Bone formation in normal mice and mutants for the runt gene Cbfa1 Bone formation in normal mice and mutants for the runt gene Cbfa1
Video: Spermatogenesis Animation

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