A simple and rapid HPLC assay is reported for the measurement and kine
tic study of transketolase. The assay consists of monitoring the rate
of conversion of beta-hydroxypyruvate and glycolaldehyde to L-erythrul
ose. The assay is also useful in monitoring transketolase catalysed bi
otransformations for all reactions which utilise B-hydroxypyruvate as
a method of driving the reaction to completion.