In the specialized field of biochemical research, precision is paramount. As someone who frequently sources materials for analytical studies, I have learned that the most reliable way to identify and verify the identity of specific compounds is through the CAS number. When procuring peptides for expe by QS Du · 2007 · Cited by 30 — Based on the physical and chemical properties of amino acids, a new strategy for peptide reagent design, the so‐called AABPD (amino acid based‐peptide design), rimental use, relying on a name alone can be ambiguous; the Chemical Abstracts Service (CAS) registry provides a unique, verifiable identifier that ensures you are working with the exact molecular structure required for your project.
Why CAS Numbers Matter in Peptide Research
The CAS number acts as a global fingerprint for chemical substances. Whether you are C-Peptide, Human, CAS: 33017-11-7 searching for HA Peptide (often associated with influenza research) or specia Peptide I | C69H114N18O22S | CID 16131185 - structure, chemical names, physical 1 CAS. 141039-76-1. ChemIDplus; EPA DSSTox. 3.3.2 DSSTox Substance ID. lized substrates like SAMS Peptide (CAS Number: 125911-68-4), this numerical string eliminates confusion. In my experience, even minor variations in molecular synthesis—such as acetylation or PEGylation—can alter the properties of a peptide. By cross-referencing the number with the supplier’s certificate of analysis Our peptide calculator is a convenient tool for scientists as a molecular weight peptide calculator, which can be used as an amino acid calculator as well. , I can confirm the purity and structural integrity of the material.
For instance, when sourcing CAS: 33017-11-7 (C-Peptide, Human), the CAS identifier ensures that t (A) Peptide nomenclature and characteristics: name, number of amino acids (N.a.a), molecular weight (MW), isoelectric point (pI), percentage of cysteines he research team is utilizing the correct sequence for their specific assay. This level of verification is critical when dealing with complex peptides, where purity levels often need to exceed 95% or 99% (as seen in high-grade offerings from suppliers like Chem-Impex International).
Evaluating Quality and Specifications
When reviewing Biosynth's range of research peptides or browsing through extensive databases, I always look for specific technical markers. A robust product listing should provide:
* Molecular Formula: Essential for calculating stoichiometry.
* Molecular Weight: I often utilize a molecular weight peptide calculator to ensure the concentration of my stock solutions is accurate.
* Purity (HPLC/GC): High-quality peptides, such as those with CAS Number: 693-13-0 or CAS : 87687-46-5, usually come with detailed analytical documentation.
Understanding the nomenclature is equally vital. Whether you are using the three-letter symbol, one-letter symbol system as outlined in 3AA-11 guidelines, or examining the structural classification of oligopeptides versus polypeptides, clear documentation prevents experimental errors.
Navigating Research Databases
There are vast resources available for those of us involved in peptide science. Some libraries, 3AA-11 to 3AA-13. Part 1, Section C: Peptide Nomenclature 3AA-11 Definitions of Peptides 3AA-12 Amino-Acid Residues 3AA-13 The Naming of Peptides Part 2 such as those containing 1147 peptides, are designed specifically for drug development and mechanism study. When I look for a specific compound, such as CAS : 888486-23-5, I rely on reputable archives that categorize these substances by their chemical properties.
Whether you are performing solid-phase synthesis or conducting supramolecular systems chemistry, the peptide you choose must be validated. It is not enough to simply search for a "peptide"; you must ensure the CAS matches the intended application. From my personal journey in this field, I have found that maintaining a personal log of these identifiers—along with their associated molecular weights and purity grades—is the most effective way to maintain consistency across long-term research cycles.
Final Thoughts on Sourcing
When you are looking for peptides to integrate into your workflow, always prioritize suppliers who provide transparent CAS data. Whether you are dealing with simple chains or complex modified derivatives, the number is your primary safeguard against misidentification. By adhering to standardized nomenclature and rigorous verification processes, you ensure that your research remains reproducible and scientifically sound. Always verify the CAS against independent databases to guarantee that the (A) Peptide nomenclature and characteristics: name material sourced matches your experimental design requirements.