C4zip May 2026

In recent patent filings and research papers, C4 Zip-tips have been critical for identifying protein isoforms and calculating theoretical masses within 0.5 Da of their primary amino acid sequences. By removing buffers and exchange salts, researchers can achieve the high-resolution mass spectra required for modern drug development and biological research. CN101883788A - 多肽，抗体可变结构域&拮抗剂

Produced by Millipore , C4 Zip-tips are 10 µL pipette tips containing a specialized C4 (butyl) stationary phase resin. Unlike the more common C18 tips used for peptides, the C4 resin is optimized for larger, more hydrophobic molecules like intact proteins and large polypeptides. Why C4 over C18?

Allows for desalting and concentrating samples in a single, fast step. Standard Workflow for Sample Prep In recent patent filings and research papers, C4

In the world of proteomics, the quality of your mass spectrometry data is only as good as your sample preparation. Contaminants like salts, buffers, and detergents can easily drown out the signals of the very proteins you’re trying to study. This is where become indispensable. What are C4 Zip-tips?

Using these tips typically follows a simple four-step process: Unlike the more common C18 tips used for

While C18 is the "gold standard" for peptide mapping, it can bind proteins so tightly that they become nearly impossible to elute. The shorter carbon chain of the C4 resin offers:

Perfect for recovering larger proteins without losing them to the resin. Standard Workflow for Sample Prep In the world

Rinsing with a buffer like 0.1% trifluoroacetic acid (TFA).