A regular size large egg will contain about 6 grams of protein in it 3.5 grams in the white part of the egg 2.5 grams in the yolk. The amounts may vary based upon the size of the egg.
2 grams
I don't know how accurate but I read on a website that beef liver a 100g has 20g of protein in.
1 gram of protein = 4 calories.
On average, most cheeses have about 3-5 grams of protein per slice.