PCR (polymerase chain reaction)
PCR (polymerase chain reaction) is a technique in molecular genetics that permits the analysis of any short sequence of DNA (or RNA) even in samples containing only minute quantities of DNA or RNA. PCR is used to reproduce (amplify) selected sections of DNA or RNA for analysis. Previously, amplification of DNA involved cloning the segments of interest into vectors for expression in bacteria, and took weeks. But now, with PCR done in test tubes, it takes only a few hours. PCR is highly efficient so that untold numbers of copies can be made of the DNA.
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The higher the HDL cholesterol level, the lower the risk of coronary artery disease.The average man has an HDL cholesterol level of 40 to 50 mg/dL. In the average woman, HDL levels range from 50 to 60 mg/dL. An HDL cholesterol of 60 mg/dL or higher gives some protection against heart disease. Regular aerobic exercise, […]
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Paranasal sinus and nasal cavity cancer Lip and oral cavity cancer Nasopharyngeal cancer Oropharyngeal cancer Hypopharyngeal cancer Laryngeal cancer Salivary gland cancer Parathyroid cancer Thyroid cancer There are also metastatic head and neck cancers in which the primary tumor where the cancer originated may or may not be known.
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