There are two types of kefir: water kefir and milk kefir. Both kefir grains contain live microorganisms and are sustainable and economical. With little care, these grains can be recycled over and over again.
Since coenzyme A is, in chemical terms, a thiol, it can react with carboxylic acids to form thioesters, thus functioning as an acyl group carrier. It assists in transferring fatty acids from the cytoplasm to mitochondria.A molecule of coenzyme A carrying an acetyl group is also referred to as acetyl-CoA.oenzyme A is also the source of the phosphopantetheine group that is added as a prosthetic group to proteins such as acyl carrier protein and formyltetrahydrofolate dehydrogenase.
Coenzymes: A nonprotein component of enzymes is called the cofactor. If the cofactor is organic, then it is called a coenzyme. Coenzymes are relatively small molecules compared to the protein part of the enzyme. Many of the coenzymes are derived from vitamins. The coenzymes make up a part of the active site, since without the coenzyme, the enzyme will not function. In the graphic on the left is the structure for the coenzyme, NAD+, Nicotinamide Adenine Dinucleotide. Nicotinamide is from the niacin vitamin.