Cobalamin may refer to several substances depending on the upper axial ligand
Ligand
In chemistry, a ligand is either an atom, ion, or molecule that bonds to a central metal, generally involving formal donation of one or more of its electrons.... of the cobalt
Cobalt
Cobalt is a hard, lustrous, grey metal, a chemical element with symbol Co and atomic number 27. Although cobalt-based colors and pigments have been used since ancient times, and miners have long used the name kobold ore for some minerals, cobalt was only discovered in 1735 by Georg Brandt.... ion
Ion
An ion is an atom or molecule which has lost or gained one or more electrons, giving it a positive or negative electrical charge. According to the Bohr_model this will be from or in the outer shield 'n'.... . These are:
Cyanocobalamin is an especially common vitamer of the Vitamin B12. It is the most famous vitamer of the family, because it is chemically the most air-stable, and it is the easiest to crystallize and therefore easiest to purify after it is produced by bacterial fermentation.... (R = -CN), which is not found in nature.
Hydroxocobalamin is a natural analog of vitamin B-12, a basic member of the cobalamin family of compounds. It has an intense red color. Vitamin B12 is a term that refers to a group of compounds called cobalamins that are available in the human body in a variety of mostly interconvertible forms.... (R = -OH)
Methylcobalamin (R = -Me), which is an active form of vitamin B12
Vitamin B12
Vitamin B12 is a water soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood.... .
Adenosylcobalamin (R = -Ado), which is also an active form of vitamin B12
Vitamin B12
Vitamin B12 is a water soluble vitamin with a key role in the normal functioning of the brain and nervous system, and for the formation of blood.... .
