4.1.2.23 0.0055 - N-acetyl-D-mannosamine in 50 mM Tris-HCl, pH 7.8, at 37°C 715592 4.1.2.23 0.04 - L-arabinose in 50 mM Tris-HCl, pH 7.8, at 37°C 715592