Protein Molarity Conversion Formula:
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Protein molarity conversion calculates the molar concentration of a protein solution from mass concentration (mg/mL) and molecular weight (kDa). This conversion is essential for biochemical experiments where molar concentrations are required for accurate reagent preparation.
The calculator uses the protein molarity conversion formula:
Where:
Explanation: The formula converts mass concentration to molar concentration by dividing by the molecular weight, using consistent units (kDa for MW corresponds to mg/mL for concentration to yield mM).
Details: Accurate molarity calculation is crucial for preparing solutions with precise stoichiometry, ensuring reproducible experimental results in protein biochemistry, enzymology, and molecular biology.
Tips: Enter concentration in mg/mL and molecular weight in kDa. Both values must be positive numbers. The result will be in millimolar (mM) units.
Q1: Why use kDa for molecular weight?
A: Kilodaltons (kDa) are commonly used for protein molecular weights as they provide convenient numbers that align with mg/mL concentrations to yield mM results.
Q2: What if my molecular weight is in Da instead of kDa?
A: Convert Da to kDa by dividing by 1000. For example, 65,000 Da = 65 kDa.
Q3: Can this calculator be used for other biomolecules?
A: Yes, the same formula applies to any compound when using consistent units (mg/mL concentration and kDa molecular weight).
Q4: What are typical protein concentrations used?
A: Protein concentrations typically range from 0.1-10 mg/mL for most biochemical applications, corresponding to micromolar to millimolar concentrations.
Q5: How accurate is this conversion?
A: The conversion is mathematically exact. Accuracy depends on the precision of your concentration measurements and molecular weight determination.