So this carbon one is the anameric carbon of glucose and this carbon two is the animeric carbon of fructose. And because we have a bond between two anameric carbons, this is called the alpha twelve glycosytic linkage. And because both of these anomeric carbons essentially have a bond, like shown by the blue linkage here, this sucrose, this disaccharide, is an example of a non reducing sugar. So what exactly is a non reducing sugar? Well, as we discussed previously, a non reducing sugar is a sugar that, when mixed with some type of oxidizing agent, will not react via an oxidation reduction reaction. On the other hand, if we have a reducing sugar, when a reducing sugar is in the presence of some type of oxidizing agent, it will be oxidized.