Resources

Proteomics Databases



Metabolomics Databases

• • Antibody Sequencing: Principles, Workflows, and Applications in Antibody Discovery

  Antibody sequencing determines the amino acid sequence of immunoglobulin chains, especially the variable regions that define antigen recognition. In antibody discovery, sequence information supports clone backup, humanization, reagent redevelopment, recombinant expression, and intellectual property documentation. A team may have a functional antibody in hand, yet lack a reliable genetic record. Hybridoma cells may be lost, productivity may decline, or only purified IgG may remain from an older project.

• • How Much Does Protein Sequencing Cost? Key Factors That Affect Project Design

  Researchers planning protein sequencing often ask for a single price before the sample details are clear. That question is understandable. Grant budgets, vendor comparisons, and internal QC timelines all depend on cost predictability. However, protein sequencing is rarely sold as a one-size-fits-all assay. The price depends on which method is needed, how clean the sample is, how much sequence coverage must be documented, and how much manual interpretation and validation are included in the final report.

• • Protein Sequencing Methods Compared: Choosing the Right Strategy for Your Research

  Protein sequence is often assumed to be known before an experiment begins. In practice, many projects still need direct sequence evidence. A purified gel band may not match any database entry. A recombinant product may differ from the intended construct. An antibody may lack complete genetic records.

• • How to Perform Protein Sequencing: Key Steps From Sample Preparation to Sequence Analysis

  Researchers often need protein sequence evidence when a construct file, transcript, or database entry is incomplete. A purified band may require confirmation before cloning. A recombinant batch may need QC documentation. An antibody product may lack full genetic records.

• • Single-Cell CUT&Tag Analysis Strategies and Common Challenges

  Epigenetic profiling at the single-cell level has become an essential approach for investigating cellular heterogeneity and dynamic regulatory processes. Single-cell CUT&Tag (scCUT&Tag), characterized by high sensitivity and resolution, represents a state-of-the-art technique for profiling epigenetic states at single-cell resolution. However, several technical and analytical challenges remain in practical applications. This article provides an overview of experimental strategies for single-cell CUT&Ta......

• • Top-Down Proteomics vs Bottom-Up Proteomics

  Top-Down and Bottom-Up proteomics represent two widely adopted yet fundamentally distinct mass spectrometry-based strategies. Rather than being mutually exclusive, they are highly complementary approaches within proteomics. A clear understanding of their underlying principles and appropriate application contexts enables researchers to maximize proteome information retrieval and enhance both the depth and breadth of biological discovery. With continuous advances in mass spectrometry technologies, the f......

• • De Novo Protein Sequencing vs Database-Based Identification: How to Choose

  Introduction Protein sequencing projects often reach a decision point where two LC-MS/MS strategies appear equally plausible. Database-based identification matches experimental spectra to known protein entries and is efficient when the reference is reliable. De novo protein sequencing derives sequence information directly from peptide fragmentation data when the correct reference is missing, incomplete, or untrustworthy. The wrong choice can waste sample, delay cloning or QC decisions, and produce a r......

• • De Novo Protein Sequencing: Principles, Technical Challenges, and Research Applications

  Introduction Protein sequence is often treated as solved once a gene or construct sequence is available. In many research settings, that assumption breaks down. A purified band may not match any database entry. A recombinant product may differ from the intended construct. An antibody variable region may lack complete transcript data. A sample from a non-model organism may contain proteins with no reliable reference proteome. In these cases, researchers need sequence evidence derived from the protein i......

• • Monoclonal Antibody Sequencing: Principles, Workflow, and Service Planning Basics

  Technical guide for Monoclonal Antibody Sequencing: Principles, Workflow, and Service Planning Basics.

• • Common Failure Points in Monoclonal Antibody Sequencing Projects and How to Prevent Rework

  Technical guide for Common Failure Points in Monoclonal Antibody Sequencing Projects and How to Prevent Rework.