L-alpha-Hydroxyacid oxidase isozymes. Purification and molecular properties

L-alpha-Hydroxyacid oxidase isozymes from rat liver (A isozyme) and kidney (B isozyme) have been isolated in a high state of purity with specific activities of 61 and 14.7 microkatals per gram protein respectively. The subunit molecular weights determined by sodium dodecylsulphate polyacrylamide gel electrophoresis were 40000 +/- 3000; the mouse A and B isozymes were also partially purified and their subunit molecular weights shown to be 37000.