Question 1

What are peptides?

Accepted Answer

Peptides are short amino-acid chains linked by peptide bonds, commonly spanning roughly 2 to ~50 residues for many synthetic research peptides. Smaller fragments (di-/tripeptides) also arise from enzymatic hydrolysis of proteins such as casein—a classic context in nutrition research comparing peptide versus free-amino-acid uptake. Their sequence specificity makes them versatile tools in preclinical investigation.

Question 2

What is the purity of PeptPro peptides?

Accepted Answer

Our catalog peptides are specified at 99% purity (HPLC) per batch COA. SKUs under development follow their own documentation when released.

Question 3

Do peptides have a Certificate of Analysis (COA)?

Accepted Answer

All our peptides follow rigorous quality control standards, including purity analysis by HPLC, molecular weight confirmation by mass spectrometry (MS), physicochemical evaluation, and lot traceability.

Question 4

How should I store the peptides?

Accepted Answer

Lyophilized peptides should be stored at -20°C or colder, protected from light and moisture. After reconstitution, they should be aliquoted and stored at -20°C or -80°C, avoiding freeze-thaw cycles. Consult each product COA for specific recommendations.

Question 5

What is the shelf life of peptides?

Accepted Answer

Lyophilized peptides stored correctly have a typical shelf life of 1–2 years. The specific expiration is indicated on each product COA. After reconstitution, stability is significantly lower and depends on the specific peptide and storage conditions.

Question 6

How do I request a quote?

Accepted Answer

You can request a quote through our contact form or by email. Provide the peptides of interest, desired quantities, and your institution details.

Question 7

What is the delivery time?

Accepted Answer

Products in stock are shipped within 1–2 business days after payment confirmation. Transit time varies by location. For custom peptides, the lead time is 2–4 weeks. Consult our team for specific timelines.

Question 8

How is peptide quality guaranteed?

Accepted Answer

All peptides undergo rigorous quality control testing including HPLC for purity, mass spectrometry for identity confirmation, and visual inspection. Each batch is documented with detailed COA and we maintain complete traceability.

Frequently asked questions