Generated by selective brother x sister breeding of 18 non-diabetic Jcl:Wistar rats which were glucose intolerant on oral glucose tolerant tests. This colony is from F36 generation of the Japanese colony provided by Drs. Suzuki and Toyota of Tokoku University , Sendai Japan.
Have a defect in synthesizing or releasing functional chiro-inositol-containing inositol phosphoglycan (IPG) and also IPG-regulated intracellular gllucose metabolism is defective.