Diurnal changes of serum p3-Alc
levels over a 24 hr period. Sera of young healthy volunteers (A, 6 males; B, 7 females) were examined for p3-Alcα contents every 8 h within a day. Sampling times (5 p.m., 1 a.m. and 9 a.m.) are indicated. Clinical information about the volunteers and values for p3-Alcα levels in sera are described in panel C.