Abstract
Summary
Parotid salivary proteins from monozygotic twins, dizygotic twins, nontwin sibs, and unrelated male and female subjects of the same age range as the twins were separated by polyacrylamide gel slab elec-trophoresis at pH 9.0. Variability of the stained protein patterns increased in the order: monozygotic twins; dizygotic twins and nontwin sibs; unrelated subjects. It is concluded that genetic factors are the major contributors to variability of parotid salivary proteins among subjects.
The twins analyzed in this study and the zygosity determinations of the twins were made available through the cooperation of David T. Lykken, Department of Psychiatry, University of Minnesota.
Get full access to this article
View all access options for this article.