Yolk dating sites
The proteins function partly as food in their own right, and partly in controlling the storage and supply of the other nutrients.
For example, in some species the amount of yolk in an egg cell affects the developmental processes that follow fertilization.
As stored food, yolks are often rich in vitamins, minerals, lipids and proteins.
In gymnosperms, the remains of the female gametophyte serve also as food supply, and in flowering plants, the endosperm.
In the avian egg, the yolk usually is some shade of yellow in color.
The yolk of one large egg (56.7 g total, 17.6 g yolk) contains around 2.8 g protein, 191 mg cholesterol, 0.63 g carbohydrates, and 4.66 g total fat.
All of the fat-soluble vitamins (A, D, E, and K) are found in the egg yolk.