Preliminary evidence for a fourth phosphoglucomutase (PGM) locus in the dog.

The PGM polymorphisms were investigated in starch gel electrophoresis in a total of 34 dogs. After prolonged incubation, a zone located 5-6 cm anodal to PGM3 was found in which two clear bands were identified. Two dogs had only the faster band, and two dogs had only the slower band. This provides preliminary evidence for the existence of a fourth PGM locus in dogs. A series of exclusion experiments indicates that the newly found bands contain PGM activity.