Protein Charge Calculator

Calculate Protein Charge







Formula

To calculate the Net Charge (Q) of a protein:

\[ Q = (n_R - n_D + n_K + n_H) \times 1.602 \times 10^{-19} \]

Where:

What is Protein Charge?

A protein charge, also known as a net charge, refers to the overall electrical charge of a protein molecule. This charge is determined by the sum of the charges of the amino acids that make up the protein. Each amino acid has a specific charge, either positive, negative, or neutral, depending on its pH level. The protein's charge can influence its structure, function, and interactions with other molecules. It is also crucial in processes such as protein separation and purification.

Example Calculation 1

Let's assume the following values:

Using the formula:

\[ Q = (20 - 10 + 15 + 5) \times 1.602 \times 10^{-19} = 4.008 \times 10^{-18} \, \text{C} \]

The Net Charge is \(4.008 \times 10^{-18}\) C.

Example Calculation 2

Let's assume the following values:

Using the formula:

\[ Q = (10 - 5 + 10 + 5) \times 1.602 \times 10^{-19} = 3.204 \times 10^{-18} \, \text{C} \]

The Net Charge is \(3.204 \times 10^{-18}\) C.