Volume 23, Issue 3 (July 1978)
Problems of Reliability in the Phenotyping of Erythrocyte Acid Phosphatase in Bloodstains
Erythrocyte acid phosphatase (EAP) phenotypes have been shown to have a good frequency distribution  and EAP is therefore a useful discriminator in forensic investigations. The five common phenotypes, namely AA, BA, BB, CA, and CB, can now be readily and accurately determined with fresh blood . Bloodstains aged for 30 days on white cotton cloth under laboratory conditions were also accurately typed .