They are separate entities that cannot be synthesized".
Food contains approximately 20 common amino acids, 9 of which are considered essential, or indispensable, for humans; i.e., they cannot be synthesized by the body or cannot be synthesized in sufficient quantities and therefore must be taken in the diet.
These essential fatty acids must be supplied in the diet since they cannot be synthesized in the body.
But proponents of synthetic biology say that the more extensively modified yeast can make things that cannot be synthesized chemically and could not previously be made by fermentation.
Twenty amino acids, including nine that cannot be synthesized in humans and must be obtained through food, are involved in metabolism.
Required nutrients that cannot be synthesized by the body and therefore must be taken regularly are essential amino acids, water-soluble and fat-soluble vitamins, minerals, and essential fatty acids.
Animals cannot synthesize all vitamins they require; those that cannot be synthesized must therefore be acquired in the diet, either from plants or from other animals that can synthesize the vitamin.
The nutritive requirements of insects are much the same as those of mammals water, inorganic ions, and essential amino acids (i.e., those that cannot be synthesized by the animal).
Vitamins, on the other hand, generally cannot be synthesized in amounts sufficient to meet bodily needs and therefore must be obtained from the diet or from some synthetic source.
It was observed that for PEG200 volumes lower than 60 ml, the IOMNPs cannot be synthesized.
In the ΔglgC mutant, glycogen cannot be synthesized and a carbon sink pathway has been effectively removed.
