What molecules are in vitamin B12?
The structure of B12 is based on a corrin ring, which is similar to the porphyrin ring found in heme. The central metal ion is cobalt. As isolated as an air-stable solid and available commercially, cobalt in vitamin B12 (cyanocobalamin and other vitamers) is present in its +3 oxidation state.
What is the classification of vitamin B12?
Cyanocobalamin or vitamin B12 is an essential B-vitamin that is classified as a water-soluble vitamin. Food sources of vitamin B12 include fish, shellfish, meats, and dairy products.
Is B12 a protein?
From there, vitamin B12 combines with a protein called intrinsic factor so that it can be absorbed further down in the small intestine. Supplements and fortified foods contain B12 in its free form, so they may be more easily absorbed. There is a variety of vitamin B12 supplements available.
What is the metabolic role of vitamin B12?
Vitamin B12 is a key nutrient associated with one carbon metabolic pathways related to substrate metabolism, synthesis and stability of nucleic acids and methylation of DNA which regulates gene expression.
What is B12 chemical name?
Vitamin B12 occurs in several forms, called cobalamins; cyanocobalamin is the principal one used in vitamin supplements and pharmaceuticals.
What is the molecular weight of vitamin B12?
1,355.38 g/molCobalamin / Molar mass
Is vitamin B12 an element or compound?
vitamin B12 | chemical compound | Britannica.
What is chemical name of vitamin B12?
Cyanocobalamin (commonly known as Vitamin B12) is a highly complex, essential vitamin, owing its name to the fact that it contains the mineral, cobalt. This vitamin is produced naturally by bacteria, and is necessary for DNA synthesis and cellular energy production.
Is B12 an amino acid?
Vitamin B-12 also helps turn homocysteine into methionine in your body. These are types of amino acids.
Is B12 a micronutrient?
Micronutrients are one of the major groups of nutrients your body needs. They include vitamins and minerals….Water-Soluble Vitamins.
| Nutrient | Sources | RDA or AI (adults > 19 years) |
|---|---|---|
| Vitamin B12 (cobalamin) | Clams, fish, meat | 2.4 mcg |
What causes a B12 deficiency?
Some people can develop a vitamin B12 deficiency as a result of not getting enough vitamin B12 from their diet. A diet that includes meat, fish and dairy products usually provides enough vitamin B12, but people who do not regularly eat these foods can become deficient.
Why is it called B12?
¿Qué causa un nivel bajo de vitamina B12?
Un nivel bajo de vitamina B12 puede causar entumecimiento u hormigueo en brazos y piernas, debilidad y pérdida del equilibrio. Los rangos de los valores normales pueden variar ligeramente entre diferentes laboratorios. Algunos laboratorios usan diferentes medidas o pueden analizar diferentes muestras.
¿Cuáles son las presentaciones de la vitamina B12?
Suele presentarse en una forma denominada cianocobalamina. Otras presentaciones habituales son la adenosilcobalamina, la metilcobalamina y la hidroxicobalamina. La vitamina B12 también se consigue en una presentación que se disuelve debajo de la lengua (llamada vitamina B12 sublingual).
¿Qué es la vitamina B12 inyectable?
La vitamina B12 inyectable puede administrarse si un médico la ha recetado. En general, esta forma se utiliza para tratar la deficiencia de vitamina B12. La vitamina B12 también está disponible con receta médica en forma de gel que se rocía en la nariz.
¿Cuál es la estructura química de la vitamina B 12?
La vitamina B 12 tiene la estructura química más grande y compleja de todas las vitaminas. Es única entre las vitaminas debido a que contiene un ión metálico, el cobalto. Por esta razón cobalamina es el término usado para referirse a los compuestos que poseen actividad de la vitamina B 12.