How many amino acids can a protein have?

As of 2003, the largest protein known to date is titin, which weighs 3-3.8 megadaltons (that's 3-3.8 million atomic mass units) and comprised of around 30000 amino acids. read more

Combining these spirals, sheets, and loops is how the three-dimensional shape of the protein is made. You can also combine multiple strands of amino acids to make even bigger protein shapes. 21 is all it takes. The human body uses just 21 amino acids to make all the proteins it needs to function and grow. read more

The amount of amino acids in a protein is basically endless as long as the protein can fold into a stable form after synthesis. Theoretically the length of a protein would be limited by the length of the RNA which in turn is made from DNA. read more

In 1902, Emil Fischer and Franz Hofmeister independently proposed that proteins are formed from many amino acids, whereby bonds are formed between the amino group of one amino acid with the carboxyl group of another, resulting in a linear structure that Fischer termed"peptide". read more