Proteomics Analysis Workflow for Target Analytes

The proteomics analysis workflow generally involves the following steps:

 

1. Sample Preparation

• Samples such as cells, tissues, serum, or urine are collected and prepared for analysis.
• Proteins are extracted from the samples to release them from the cellular or tissue matrix.
• Protein concentrations are then determined, and samples are adjusted to suitable volumes and concentrations for subsequent experiments.

 

2. Protein Purification

Proteins are purified using standardized techniques, including SDS-PAGE, two-dimensional gel electrophoresis, or liquid chromatography methods such as high-performance liquid chromatography (HPLC).

 

3. Protein Digestion

Purified proteins are enzymatically digested into peptides, typically using trypsin.

4. Peptide Separation

Peptides are further separated using liquid chromatography techniques, such as reversed-phase high-performance liquid chromatography (RP-HPLC).

 

5. Mass Spectrometry Analysis

• The digested peptides are analyzed using liquid chromatography–tandem mass spectrometry (LC–MS/MS).
• Mass spectrometric analysis identifies the peptides and determines their corresponding amino acid sequences.

 

6. Data Analysis

• The LC–MS/MS data are processed and analyzed using bioinformatics tools to identify and quantify proteins.
• Protein expression profiles are then compared across different samples to identify differentially expressed proteins.

 

MtoZ Biolabs, an integrated chromatography and mass spectrometry (MS) services provider.

Related Services

Proteomics Analysis Service