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Polymerase Chain Reaction (PCR) Testing

The polymerase chain reaction (PCR) is a fast and inexpensive technique used to "amplify" - copy - small segments of DNA to enable testing.

Blood, Types and ABO Testing

Blood groups explained, and how your blood works to provide life to your entire body. Understand donor compatibility and classification.

The SERPINA1 Gene, serpin family A member 1

The SERPINA1 gene provides instructions for making a protein called alpha-1 antitrypsin, which is a type of serine protease inhibitor (serpin)

Understanding Your Blood Pressure

More attention is given to systolic blood pressure (the first number) as a major risk factor for cardiovascular disease for people over 50.