In: Chemistry
How to get the PI of a polypeptide.
We start from the extreme right i.e., Glu and start building to the left
COOH of amino acid (Glu) is protected on solid support and NH2 part is kept to form peptide bond with other amino acid (Lys) having NH2 group protected and COOH part activated. The same process is repeated until the entire polypeptide is synthesized.
This can be understood with the help of the illustration below.
In the last step, solid support is removed to obtain the desired polypeptide.