5× Protein Loading Buffer (Reducing)

Description

5× Protein Loading Buffer (Reducing) is a concentrated SDS-PAGE protein sample loading buffer designed for efficient protein denaturation and reduction before gel electrophoresis. During protein sample preparation, incomplete protein unfolding or insufficient disulfide bond reduction can affect protein migration, molecular weight estimation, and downstream Western blot analysis. This reducing protein loading buffer provides a reliable solution for preparing consistent protein samples by combining strong denaturing conditions with an advanced reducing system.

Unlike traditional SDS-PAGE sample buffers containing DTT or β-mercaptoethanol, this 5× reducing sample buffer uses a new-generation odor-free reducing agent that provides strong reduction capability with improved thermal stability. The optimized formulation maintains reducing performance during high-temperature sample treatment while avoiding the unpleasant odor associated with commonly used reducing reagents.

5× Protein Loading Buffer (Reducing) is suitable for protein electrophoresis workflows including SDS-PAGE, Western blot sample preparation, recombinant protein analysis, and cell or tissue lysate evaluation. The formulation is designed to maintain a neutral pH after heating, helping minimize protein degradation during sample preparation.

Specifications

Features

• Strong reducing performance: Provides efficient disulfide bond reduction to promote complete protein denaturation before SDS-PAGE analysis.

• Odor-free reducing formulation: Eliminates the strong odor associated with β-mercaptoethanol and provides a more convenient laboratory workflow.

• High thermal stability: Maintains reducing activity during high-temperature protein sample treatment.

• Compatible with SDS-PAGE and Western blot workflows: Supports routine protein electrophoresis and immunoblotting applications.

• Optimized sample preparation: Maintains neutral pH after heating to help reduce protein degradation during denaturation.

• 5× concentrated format: Provides flexible sample preparation with reduced reagent consumption compared with ready-to-use loading buffers.

Applications

5× Protein Loading Buffer (Reducing) is widely used for preparing protein samples in molecular biology, biochemistry, and protein analysis workflows.

• SDS-PAGE Protein Electrophoresis: Prepares denatured and reduced protein samples for separation according to molecular weight.

• Western Blot Sample Preparation: Generates consistent protein lysates for electrophoresis followed by antibody-based detection.

• Cell Lysate Protein Analysis: Suitable for preparing whole-cell protein samples from cultured cells.

• Tissue Protein Extraction Analysis: Supports analysis of proteins extracted from biological tissue samples.

• Recombinant Protein Characterization: Used for evaluating recombinant protein expression and purity after purification.

• Protein Molecular Weight Determination: Enables accurate comparison of protein migration patterns during SDS-PAGE.

• Protein Expression Studies: Suitable for research involving protein abundance comparison and expression analysis.

• Proteomics Sample Preparation: Provides standardized protein denaturation and reduction before electrophoretic analysis.

Protocol Overview

For SDS-PAGE sample preparation, combine protein samples with 5× Protein Loading Buffer (Reducing) according to the recommended dilution ratio.

• Add 1 μL of 5× Protein Loading Buffer to every 4 μL of protein sample.
• Mix thoroughly to ensure complete sample homogenization.
• Heat samples at 100°C for 5–10 minutes to denature proteins.
• Cool samples to room temperature.
• Centrifuge at 10,000–14,000 rpm for 5 minutes.
• Transfer the supernatant and load directly onto SDS-PAGE gels.

This product contains denaturing components and is intended for SDS-PAGE workflows. It is not suitable for native PAGE or non-denaturing electrophoresis.

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