How many different protein consisting of 100 amino acids can be formed from 20 different amino acids ?

Protein amino acids are

Protein amino acids are

Protein amino acids are

The 20 different amino acids have different

The 20 different amino acids have different

The 20 different amino acids have different

(a) Let the letters A and B represent two different amino acids. Write down the sequences of all the possible tripeptides that could be made with just these two amino acids. (b) What is the formula for calculating the number of different tripeptides that can be formed from two different amino acids ?

Proteins are assembled from how many amino acids ?