With which does nitrites primarily react in meat protein?

Nitrites primarily react with amines in meat protein through a process called nitrosation. When nitrites are added to meat, they can interact with the amino acids present in proteins, which contain amine groups. This reaction is particularly significant because it leads to the formation of nitrosamines, some of which are known to be potential carcinogens.

The presence of nitrites also serves as a preservative in meats, preventing the growth of bacteria and enhancing color and flavor. While other components such as fats and carbohydrates play roles in meat quality and preservation, the primary reaction of nitrites in the context of protein chemistry specifically pertains to amines. This is why the correct answer identifies amines as the primary reactive component when nitrites are introduced to meat protein.