Description

PMSF (100mM), also known as Phenylmethylsulfonyl Fluoride (PMSF), is a commonly used serine protease inhibitor designed to protect proteins from enzymatic degradation during cell lysis and protein extraction workflows. During sample preparation, endogenous proteases released from disrupted cells or tissues can rapidly degrade target proteins, resulting in reduced protein recovery, altered protein profiles, and inconsistent downstream analysis. Adding PMSF protease inhibitor to lysis buffers helps maintain protein integrity and improves sample quality for molecular biology applications.

This 100mM PMSF solution is supplied as a concentrated protease inhibitor stock solution and is commonly added to RIPA lysis buffer or other protein extraction buffers before use. PMSF irreversibly inhibits serine proteases, including trypsin, chymotrypsin, and thrombin, helping prevent proteolytic degradation during protein extraction. The recommended working concentration is typically 1mM PMSF, making it suitable for routine preparation of cell lysates and tissue protein extracts.

PMSF (100mM) is widely used in Western blot (WB), SDS-PAGE, immunoprecipitation (IP), co-immunoprecipitation (Co-IP), and other protein analysis workflows where maintaining intact protein samples is essential. It can be used as an individual protease inhibitor or as a component of customized protease inhibitor formulations according to experimental requirements.

Specifications

Product Name	PMSF (100mM)
SKU	AP0341S
Volume	1 mL
Product Type	PMSF Protease Inhibitor Solution
Concentration	100 mM
Synonym	Phenylmethylsulfonyl Fluoride
Recommended Working Concentration	1 mM final concentration
Applications	Protein extraction, Western blot, SDS-PAGE, IP, Co-IP
Storage	-20 °C
Shelf Life	18 months

Features

Effective serine protease inhibition: PMSF irreversibly inhibits serine proteases and helps protect target proteins during cell lysis and extraction.
Ready-to-use 100mM stock solution: Provides a convenient concentrated PMSF solution for preparation of protein extraction buffers.
Compatible with RIPA buffer workflows: Can be added to RIPA lysis buffer to reduce proteolytic degradation during protein sample preparation.
Supports protein integrity preservation: Helps maintain intact protein samples for downstream biochemical and molecular biology analysis.
Suitable for customized inhibitor formulations: Can be combined with other protease or phosphatase inhibitors according to experimental requirements.

Applications

PMSF (100mM) is widely used as a protein extraction protease inhibitor in cell biology, molecular biology, and biochemical research workflows where prevention of protein degradation is required.

Western Blot Protein Analysis: Used during protein extraction to protect target proteins and improve the reliability of SDS-PAGE and Western blot detection.
RIPA Buffer Protein Extraction: Added to RIPA lysis buffer as a protease inhibitor supplement to minimize degradation of cellular proteins during lysis.
Cell Lysate Preparation: Protects proteins extracted from cultured mammalian cells, bacteria, yeast, and other biological samples.
Tissue Protein Extraction: Helps preserve protein profiles during extraction from animal tissues and complex biological samples.
Immunoprecipitation (IP): Supports preparation of protein lysates with improved protein stability for antibody-based enrichment workflows.
Co-Immunoprecipitation (Co-IP): Helps maintain protein complexes during extraction for protein-protein interaction studies.
SDS-PAGE Sample Preparation: Provides improved protein sample protection before electrophoretic separation.
Protein Purification Workflows: Used as an individual protease inhibitor to protect recombinant or native proteins during purification procedures.

Protocol Overview

PMSF (100mM) should be added to protein extraction buffers immediately before use because PMSF activity decreases over time in aqueous solutions.

Add PMSF stock solution to RIPA lysis buffer or other protein extraction buffers to achieve a final concentration of approximately 1mM.
For routine preparation, add PMSF (100mM) at a 1:100 ratio to achieve the recommended working concentration.
Perform cell or tissue lysis under cold conditions to minimize protease activity.
Proceed with downstream applications such as Western blot, SDS-PAGE, IP, or Co-IP after clarification of lysates.

Ordering Information

SKU	Product	Size
AP0341S	PMSF (100mM)	1 mL

FAQ

What is PMSF protease inhibitor used for?

PMSF protease inhibitor is used to prevent protein degradation during cell lysis and protein extraction. It inhibits serine proteases released during sample preparation and helps maintain protein integrity for applications such as Western blot, SDS-PAGE, IP, and Co-IP.

Why is PMSF added to RIPA buffer?

PMSF is commonly added to RIPA lysis buffer because cell disruption releases endogenous proteases that can degrade target proteins. Adding PMSF helps protect extracted proteins and improves the quality of protein lysates for downstream analysis.

What is the recommended PMSF concentration for protein extraction?

The commonly used final concentration of PMSF in protein extraction buffers is approximately 1mM. PMSF (100mM) stock solution is typically diluted 1:100 into RIPA buffer or other compatible lysis buffers.

Which proteases are inhibited by PMSF?

PMSF is an irreversible inhibitor of many serine proteases, including trypsin, chymotrypsin, and thrombin. It is widely used as a serine protease inhibitor during protein extraction workflows.

Can PMSF be used for Western blot sample preparation?

Yes. PMSF is frequently used during Western blot sample preparation to reduce proteolytic degradation and improve preservation of target proteins before SDS-PAGE and antibody detection.

How should PMSF solution be stored?

PMSF (100mM) should be stored at -20 °C. Proper storage and minimizing repeated freeze-thaw cycles help maintain product performance.

PMSF (100 mM)