IPGMAKER: a program for IBM-compatible personal computers to create and test recipes for immobilized pH gradients

Area of Science:

• Biochemistry
• Computational Biology
• Proteomics

Background:

• Immobilized pH gradients (IPGs) are crucial for high-resolution protein separation.
• Accurate recipe design is essential for reproducible IPG electrophoresis.
• Computational tools can streamline the complex process of IPG formulation.

Purpose of the Study:

• To introduce IPGMAKER, a software program for designing and testing immobilized pH gradients.
• To provide a user-friendly computational aid for researchers working with IPGs.
• To facilitate the estimation of protein isoelectric points (pI) using primary structure data.

Main Methods:

• The IPGMAKER program utilizes algorithms to calculate gradient recipes based on user-defined parameters.
• It supports up to 10 acids/bases and pH ranges from 2 to 12.
• Subroutines analyze gradient properties (pH, slope, buffering capacity) and predict protein pI.

Main Results:

• IPGMAKER generates precise recipes for creating near-linear immobilized pH gradients.
• The software presents recipes as final concentrations or stock solution volumes.
• It offers in-program analysis of gradient characteristics and protein pI estimation.

Conclusions:

• IPGMAKER serves as an effective computational aid for immobilized pH gradient electrophoresis.
• The program simplifies the creation of custom IPG recipes, enhancing experimental reproducibility.
• It offers valuable tools for both gradient design and preliminary protein characterization.