The present invention relates to an enzymatic method for removing sulphite. In particular, the present invention relates to a method for converting sulphite present in a composition into thiosulphate, comprising the introduction of 3-mercaptopyruvate sulphurtransferase (3-MST) and a substrate of said 3-mercaptopyruvate sulphurtransferase into said composition. The present invention can be used in particular in the pharmaceutical, cosmetic, food and chemical fields, and any field involving the use of sulphite.

The presently disclosed invention relates to a method of diagnosing Multiple Sclerosis (MS) in a patient comprising obtaining a sample from the patient, determining a level of one or more H2S generating enzymes in the sample from the patient, and diagnosing the patient with MS when the level of the one or more H2S generating enzymes is one of at least 15% higher or lower than a control level for the one or more H2S generating enzymes, and at least 10% higher or lower than a control level for the one or more H2S generating enzymes.

The present invention relates to an enzymatic method for removing sulphite. In particular, the present invention relates to a method for converting sulphite present in a composition into thiosulphate, comprising the introduction of 3-mercaptopyruvate sulphurtransferase (3-MST) and a substrate of said 3-mercaptopyruvate sulphurtransferase into said composition. The present invention can be used in particular in the pharmaceutical, cosmetic, food and chemical fields, and any field involving the use of sulphite.