title: The quantitative determination of apolipoprotein A-I (apo-lp-Gln I) in human serum by radial immunodiffusion assay (RID).
abstract: A radial immunodiffusion (RID) assay was developed to determine the concentration of the major apolipoprotein (apolipoprotein A-I, apo-lp-Gln I) of human high density lipoproteins (HDL): (1) In a random population sample of apparently healthy persons (104 women, 95 men) aged 40-49 years, serum levels of apo A-I were determined. For both women and men a value of 137 +/- 23 mg/dl was found. (2) Values of 139 +/- 21 mg/dl were found in a group of 31 women taking oral contraceptives, i.e. an insignificant increase in apo A-I level. (3) In two volunteers, apo A-I levels showed no significant variation in a 24-h period.
mesh_terms: D000328:Adult; D001053:Apolipoproteins / Q000097:blood*; D005260:Female; D006306:Health Surveys; D006801:Humans; D005779:Immunodiffusion / Q000379:methods; D008075:Lipoproteins, HDL / Q000097:blood*; D008297:Male; D008875:Middle Aged; D009994:Osmolar Concentration
chemical_list: D001053:Apolipoproteins; D008075:Lipoproteins, HDL