Published online by Cambridge University Press: 14 April 2009
1. An investigation of the serum esterases of the field-vole, M. agrestis, has been carried out by the method of starch-gel electrophoresis.
2. A total of 254 animals, mainly from Carron Valley, near Stirling, have been examined.
3. Evidence is presented for a system of four enzymes controlled by two genetic loci, which it is proposed to call Es-3C and Es-3R.
4. Each locus specifies one polypeptide sub-unit of the E3 enzyme, which is a dimer.
5. The two loci each have two alleles present at high frequencies in the population examined.