Here's a breakdown:
* Proteins: Albumen is primarily composed of water (around 88%) and proteins (around 11%). The proteins are primarily ovalbumin, conalbumin, ovotransferrin, and ovomucin. These proteins, especially ovomucin, form a complex network of intertwined strands that trap water molecules, giving albumen its viscous, gel-like consistency.
* Other molecules: While proteins are the main contributors to viscosity, other molecules play smaller roles:
* Carbohydrates: Albumen contains small amounts of carbohydrates like glucose and galactose.
* Lipids: There are trace amounts of lipids, but their impact on viscosity is minimal.
In essence, the intricate structure of proteins, particularly ovomucin, is the key factor responsible for the viscous nature of egg white.