| IDENTIFICATION OF SPECIES OF ORIGIN | 
	Species of Origin Confirmed by Nucleoside Phosphorylase, Glucose-6-Phosphate Dehydrogenase, and Lactate Dehydrogenase Isoenzyme Electrophoresis and by Chromosome Analysis | 
	|   | 
                                                                
	| Gene | 
	APOE | 
	| Chromosomal Location | 
	19q13.2 | 
	| Allelic Variant 1 | 
	107741.0016; APOE4 ISOFORM | 
	| Identified Mutation | 
	CYS112ARG; Weisgraber et al. [J. Biol. Chem. 256: 9077-9083 (1981)], Das et al. [J. Biol. Chem. 260: 6240-6247 (1985)] and Paik et al. [Proc. Nat. Acad. Sci. 82: 3445-3449 (1985)] identified the apolipoprotein E4 isoform in which there is a Cys112-to-Arg substitution. This variant is found in 6% to 37% of individuals from different populations. | 
	|   | 
	| Gene | 
	APOE | 
	| Chromosomal Location | 
	19q13.2 | 
	| Allelic Variant 2 | 
	107741.0016; APOE4 ISOFORM | 
	| Identified Mutation | 
	CYS112ARG; Weisgraber et al. [J. Biol. Chem. 256: 9077-9083 (1981)], Das et al. [J. Biol. Chem. 260: 6240-6247 (1985)] and Paik et al. [Proc. Nat. Acad. Sci. 82: 3445-3449 (1985)] identified the apolipoprotein E4 isoform in which there is a Cys112-to-Arg substitution. This variant is found in 6% to 37% of individuals from different populations. |