6 SEP 2018 · Peptide Mass Calculator and Mass Fingerprinting With research applications, sometimes it becomes necessary for researchers to determine the molecular weight of proteins or peptide sequences. Peptide Mass Calculator and Mass Fingerprinting With research applications, sometimes it becomes necessary for researchers to determine the molecular weight of proteins or peptide sequences. There are a number of methods through which this can be done, with some including manual calculation of the various components. However, for the sake of time and to have more accurate results, peptide mass calculators were designed to help researchers find out the mass of the peptide sequences in a hassle-free manner. With the calculator, no tedious calculations are needed, and you don’t even have to memorize a formula. Using a peptide calculator is as easy as using any other type of simple calculator. Once you know the sequence of the protein or peptide who’s molecular mass you are interested in, all you have to do is feed in the sequence into the calculator, and it will do its magic and return the peptides’ molecular weight to you. It is a handy tool for those who deal with a lot of peptide research, and the fact that it is available in a number of peptide blogs also makes it more convenient since you don’t have to buy it or own one. Just get online and go to your favorite peptide blog and use the calculator for free. Protein mass fingerprinting, on the other hand, refers to an analytical technical process used to identify proteins where the unknown protein is broken down into smaller peptides whose molecular masses can be easily determined using a peptide calculator. Once the peptide masses are determined, they are then run against a database of known peptides, and the results are then correlated to help in the identification of the unknown peptide. This method is preferred over other methods of protein identification, since all you need is the molecular masses of the peptides making up the protein to identify the unknown protein. It is simple, easy, less time consuming and very accurate.