Collection: Proteins & Peptides

Use exactly the buffer and concentration recommended on the datasheet — some proteins are hydrophobic near neutral pH and will cling to the vial or refuse to dissolve in the wrong buffer. Let the vial sit briefly after adding liquid, swirl gently instead of vortexing, and spin down before opening.

Carrier formulations add BSA, which stabilizes dilute protein and extends shelf life — the usual choice for cell culture supplements and ELISA standards. Carrier-free versions leave the BSA out for conjugation, labeling, mass spectrometry, or in vivo work where added protein would interfere.

Yes — E. coli offers yield but no glycosylation, while mammalian, insect, and plant systems add folding machinery and post-translational modifications. TriBioScience's recombinant human lactoferrin, for example, is produced in a rice endosperm system as an animal-free alternative with native structure and function.

Aliquot immediately to single-experiment volumes and freeze; repeated freeze-thaw cycles are the fastest way to lose activity. Follow the datasheet for temperature — typically -20°C to -80°C for stocks — and keep working aliquots on ice, not at room temperature.

TriBioScience's protein and peptide catalog — cytokines such as TNF-alpha, EPO, and specialty items like the NanoLuc substrate furimazine — is available to Israeli labs via Danyel Biotech with local stock and fast quoting.