Animal proteins and plant proteins

Animal proteins and plant proteins

Info source

http://en.m.wikipedia.org/wiki/Complete_protein

Generally, proteins derived from animal foods (meats, fish, poultry, cheese, eggs, yogurt, and milk) are complete, though gelatin is an exception.[1] 

Proteins derived from plant foods (legumes, grains, and vegetables) tend to have less of one or more essential amino acid.[6] 

Some are notably low, such as corn protein, which is low in lysine and tryptophan.[9]