Abstract
1. Tvrosinase gives a high reduction potential with p-cresol and glycin in nitrogen-gas. In the presence of oxygen, this is not so significant.
2. Tyrosine itself shows a sufficiently high reductions potential, which is not intensified by tyrosinase, even in presence of glycin.
3. The reduction potential of catechol and hyrochinone, but not that of resoreinol is inereased by tyrosinase in the presence of glyein.
