Carbohydrates and lipids.
There is no specific element that is symbolic of proteins.
Proteins are not elements; they are very complex organic compounds.
Phosphorus complexes are present in proteins but is not present in sugars or fats..
amonia
Nitrogen.
Nitrogen is found in proteins but not in carbohydrates and lipids
phosphorus is present in nucleic acids and not in proteins
Proteins are chemical compounds.
None. Helium is an element.
Sulfur
Nitrogen
nitrogen