1. What is Enzyme Substrate Dissociation Constant?

Definition: The Enzyme Substrate Dissociation Constant (K_i') represents the affinity between an enzyme and its substrate when modified by an inhibitor.

Purpose: This calculator helps biochemists determine the dissociation constant based on inhibitor concentration and the enzyme substrate modifying factor.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( K_i' \) — Enzyme Substrate Dissociation Constant (mol/m³)
• \( I \) — Inhibitor Concentration (mol/m³)
• \( \alpha' \) — Enzyme Substrate Modifying Factor

Explanation: The inhibitor concentration is divided by (modifying factor - 1) to determine the dissociation constant.

3. Importance of Dissociation Constant

Details: This constant is crucial for understanding enzyme kinetics, inhibitor effects, and designing enzyme-based therapies or industrial processes.

4. Using the Calculator

Tips: Enter the inhibitor concentration in mol/m³ and the enzyme substrate modifying factor (must be > 1 for valid calculation).

5. Frequently Asked Questions (FAQ)

Q1: What does a high K_i' value indicate?
A: A high value suggests weak binding between the enzyme and substrate when modified by the inhibitor.

Q2: What's a typical range for the modifying factor?
A: The modifying factor typically ranges from 1.1 to 10, depending on the inhibitor's strength.

Q3: Why must the modifying factor be greater than 1?
A: Values ≤ 1 would give negative or infinite results, which are physically meaningless in this context.

Q4: How is inhibitor concentration typically determined?
A: Through experimental measurements like spectrophotometry or titration.

Q5: Can this calculator be used for competitive inhibition?
A: This specific formula applies to uncompetitive inhibition. Different formulas apply for competitive inhibition.