This enzyme from Bacillus licheniformis was sold originally under the brand name Protex 6L. Recently its name has been changed to Multifect PR 6L but the enzyme remains unchanged.
A diagnostic application is the determination of β-Carotene. For a discription see the article "Method for the Determination of β-Carotene in Supplements and Raw Materials by Reversed-Phase Liquid Chromatography: Single Laboratory Validation" by Joseph Schierle, Bernd Pietsch, Alan Ceresa, and Christian Fizet published in J AOAC Int. 2004; 87(5): 1070–1082.