Boronic acid or borinic acid derivatives as enzyme stabilizers

A liquid composition comprising an enzyme and a boronic acid derivative enzyme stabilizer or borinic acid derivative enzyme stabilizer of the following formula:

• ##STR3## where R.sub.1 is (a) a substituted fused aromatic ring structure containing 14 or 18 carbon atoms in the ring;
• (b) a substituted monocyclic heterocyclic ring structure containing up to 17 carbon atoms in the ring;
• (c) a substituted fused aromatic heterocyclic ring structure containing up to 17 carbon atoms in the ring;
• (d) a substituted monocyclic quinonone ring structure containing up to 18 carbon atoms in the ring;
• (e) a substituted fused quinonone ring structure containing up to 18 carbon atoms in the ring;
• wherein
• R.sub.2 has the formula:
• ##STR4## where X is the same or different and selected from hydrogen, C.sub.1 -C.sub.6 alkyl, substituted C.sub.1 -C.sub.6 alkyl, aryl, substituted aryl, hydroxy, hydroxyl derivative, halogen, amine, alkylated amine, amine derivative, nitro, thiol, thiol derivative, aldehyde, acid, acid salt, ester, sulfonate or phosphonate, and o, p and q may each be 0, 1, or 2;
• n and m may each be 0 or 1;
• R.sub.1 and R.sub.3 are independently one of a hydroxyl group, a substituted monocyclic ring structure, or a substituted dicyclic aromatic ring structure.