Fig. 1.
The structure of Kindred 129. Individuals with serum Mg2+ < 1.8 mg/dl are indicated by black symbols. Family members taking antihypertensive medications or having blood pressures over 140/90 mm Hg are indicated by an H. Members with hypercholesterolemia (serum cholesterol > 200 mg/dl or taking lipid-lowering agents) are denoted by C. Blood relatives who did not have electrolyte values measured are indicated by gray symbols. The index case is indicated by an arrow.