abstract |
The invention provides a method of producing .alpha.-tocopherol and .alpha.-tocopheryl esters and a method of producing vitamin A or .beta.-carotene. The methods comprise using a biological system to produce farnesol or geranylgeraniol. Then, the farnesol or geranylgeraniol is chemically converted into .alpha.-tocopherol, an .alpha.-tocopheryl ester, vitamin A or .beta. carotene. |