蛋白质质量-摩尔量转换

Molecular weight calculation

Knowing the molecular weight of your compound is important for biology applications ranging from

simple molecular biology processes like western blotting to clinical drug development. Molecular

weight is determined by summing the weights of the protons, neutrons, and electrons in a molecule.

To convert between mass and moles of a biomolecule, the molecular weight of a biomolecule must first

be obtained. To determine the molecular weight of a protein, sum the molecular weights of each amino

acid in the protein. Example calculations are shown below for amino acid serine. Alternatively, if

just the sequence length is entered, the average amino acid molecular weight is multiplied by the

length for an approximation.

Figure 1. Chemical structure of serine and example calculation of its molecular weight.

Mass - moles converter

In chemistry, a mole represents a quantity of substance containing Avogadro's number of particles

(6.02214076 × 1023), typically atoms or molecules. After obtaining the molecular weight

of a

biomolecule by summing the molecular weights of its components, the mass and moles of a substance

can be calculated using the following equation:

Mass Protein (g) = Moles Protein (mol) x Molecular Weight (g/mol)Figure 2. Equation used to convert between moles and mass of a substance with known

molecular weight.