(WO2004112482-A2)   NOVELTY - A coating (C1) comprises a biomolecule composition containing an active biomolecule.    USE - As a coating e.g. paint, clear coating, lacquer, varnish, shellac, stain, water repellent coating, architectural coating such as wood coating, masonry coating and/or artist's coating, industrial coating such as automotive coating, can coating, sealant coating, and/or marine coating, specification coating such as pipeline, traffic marker coating, aircraft and/or nuclear power plant coating, metal surface coating, multi-pack coating, water- or solvent-borne coating, latex coating, for detoxification of a surface contaminated with an organophosphorus compound or reducing the concentration of organophosphorus compound on a surface; in a water- or solvent-borne paint, multi-pack or two-pack latex or oil-based paint, non-film forming coating, elastomer, filler, adhesive, material applied to a textile, wax or surface treatment comprising pH indicator (all claimed).    ADVANTAGE - The coating produces a self-cleaning film. The architectural coating has pot life greater than or equal to 12 months at ambient conditions. Water-borne coating has density of 1.2-1.5 kg/l and solvent-borne coating a density of 0.9-1.2 kg/l. The coating has a viscosity during application of 72-95 Ku. The coating has a viscosity prior to application of 100-1000 P, and during application of 0.5-2.5 P, with viscosity of 100-1000 P on a surface immediately after application. The compositions are capable of effective decontamination of organophosphate (OP) compounds, as well as prophylactic protection of buildings, equipment, and personnel that contact such objects from OP compounds, including chemical warfare agents. The paint comprising the preferred enzyme composition degrades an organophosphorus compound, including a chemical warfare agent, into a significantly less toxic compound. The enzyme composition remains stable in the coating for an extended period of time (e.g. months) at ambient conditions. The compositions produce self-decontaminating surfaces that remain active for extended periods, and such a self-decontaminating surface does not need additional decontamination compositions or methods to effect decontamination, thus minimizing logistical requirement.