Stable enzyme solutions and method of manufacturing

A liquid composition comprising a dissolved protease, a phenyl boronic acid constituent or a derivative thereof, and at least one added dissolved salt constituent, wherein the anion of the salt constituent is selected from the group consisting of chloride, sulphate, and nitrate, wherein the cation of the salt constituent is selected from the group consisting of Zn, Mg, NH4, and combinations thereof, wherein the salt constituent is present in an amount of 0.5 to 10% by weight of the total composition and the phenyl boronic acid or derivative thereof is

• wherein R is selected from the group consisting of hydrogen, hydroxy, C1-C6 alkyl, and C1-C6 alkenyl, and wherein the pH of the liquid composition is 7 to 10.5.