Abstract
Summary 1. Three models previously put forward for the molecular structure of human ceruloplasmin are critically reviewed. It is shown that they conflict with the recent information obtained from genetic and biochemical studies of genetically determined human ceruloplasmin electrophoretic variants. 2. A new model which incorporates both genetic and biochemical data is advanced. A molecular structure of two unlike subunits, αβ , for human ceruloplasmin is proposed. It is further suggested that the structure be described as a heterodimer.
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