Resources

Proteomics Databases



Metabolomics Databases

• • How to Select and Optimize Protein Sequencing Methods?

  Protein sequencing is an important analytical technique in the field of bioproducts, which can reveal the amino acid sequence and structural information of proteins, providing key data for protein research and biopharmaceutical development. However, when choosing and optimizing protein sequencing methods, scientists need to consider multiple factors.

• • Analysis of Protein Structure Using Circular Dichroism HT Technology

  Analysis of protein structure is a critical component in the development and production of biologics, and it holds significant importance in understanding protein function and properties. In the field of protein structure analysis for biologic products, high-throughput (HT) circular dichroism spectroscopy (CD) technology is widely utilized.

• • How to Detect Whether a Protein Is Normally Phosphorylated

  Phosphorylation is a critical regulatory mechanism for protein function, influencing numerous biological processes including signal transduction, cell division, and metabolism. To assess whether proteins are phosphorylated, several analytical techniques are employed to identify and quantify their phosphorylation status. Commonly used methods include:

• • Analysis of Protein Secondary Structure Using Circular Dichroism Spectroscopy

  Analysis of protein secondary structure is crucial to revealing the mystery of their folding process. In the field of bioproduct protein structure, circular dichroism (CD) spectroscopy is widely used for analysis of protein secondary structure, revealing the mysteries of protein folding by interpreting CD spectra.

• • Mass Spectrometry Molecular Weight Change of Ubiquitination Sites

  Ubiquitination is a crucial post-translational modification that affects protein stability, activity, and function. This process involves the attachment of a 76-amino-acid ubiquitin molecule to target proteins through a cascade mediated by a trio of enzymes: E1, E2, and E3. Identifying ubiquitination sites is essential for understanding the molecular mechanisms involved. Mass spectrometry is typically employed for this purpose. During ubiquitination, the C-terminal glycine of ubiquitin forms an isopeptide..

• • Do Disulfide Bonds Affect Mass Spectrometry Analysis

  Disulfide bonds can significantly influence protein mass spectrometry analysis, particularly in the study of protein structure and peptide characterization. These covalent bonds, formed between two cysteine residues, play a crucial role in stabilizing the three-dimensional structure of proteins. In mass spectrometry-based proteomics, the presence of disulfide bonds can introduce several challenges: 1. Peptide Digestion Efficiency: Prior to mass spectrometry analysis, proteins are typically digested using...

• • Immunoprecipitation Detects Phosphorylated Proteins

  Immunoprecipitation is a widely used molecular biology technique for studying protein-protein interactions and post-translational modifications. In phosphorylated protein studies, immunoprecipitation enables the selective enrichment of phosphorylated proteins, thereby enhancing signal detection and improving analytical sensitivity.

• • The Purpose of Phosphoproteomics

  Phosphoproteomics is a vital subfield of proteomics that focuses on the study of protein phosphorylation. This post-translational modification is crucial for several biological processes, including cell cycle regulation, signal transduction, gene expression, protein degradation, and immune response. Primary Objectives of Phosphoproteomics: 1. Uncover the Biological Roles of Protein Phosphorylation: Research into the types, distribution, quantitative changes, and functions of phosphorylated proteins is......

• • How to Knock Out a Gene in a Cell

  In modern biological science, knocking out genes in cells has become a core part of many experiments. This helps researchers understand various biological phenomena, including the mechanisms of genetic diseases. The following are the main steps to knock out a gene in a cell: Designing Small Interfering RNA (siRNA): siRNA molecules are pivotal in guiding the process of gene silencing. By constructing specific siRNA sequences, we can effectively target and downregulate particular genes.

• • How to Measure Peptide Stability

  In biochemical research, investigating and assessing the stability of polypeptides is of paramount importance due to its critical influence on their biological activity and response to environmental changes. The following methodologies are commonly employed for evaluating the stability of polypeptides: Spectrophotometry: Spectrophotometry is frequently employed to assess the stability of polypeptides under various conditions such as temperature, pH, and ionic strength. By observing the changes in absorbance