. . . "The unique number assigned to a reaction by the Enzyme Commission of the International Union of Biochemistry and Molecular Biology.\n\nNote that not all biochemical reactions currently have EC numbers assigned to them."^^ . "The unique number assigned to a reaction by the Enzyme Commission of the International Union of Biochemistry and Molecular Biology.\n\nNote that not all biochemical reactions currently have EC numbers assigned to them."^^ . "The unique number assigned to a reaction by the Enzyme Commission of the International Union of Biochemistry and Molecular Biology.\n\nNote that not all biochemical reactions currently have EC numbers assigned to them."^^ . . . . . . .