In the specialized field of peptide research and biochemical analysis, precision regarding molecular specifications is paramount. As an enthusiast who frequently analyzes the structural properties of various proteins and peptides, I have spent considerable time examining the data associated with Fibrinopeptide A, particularly its mole What is the role of Fibrinopeptide A and cular weight. Understanding these granular details is essential for anyone looking to maintain high standards in labora Each peptide chain contains 18 amino acid residues. In vivo, fibrinopeptide A is used as a marker to determine the rate of conversion of fibrinogen to fibrin by tory settings or analytical studies.
The Structural Profile of Fibrinopeptide A
Fibrinopeptide A is a short, 16-amino acid peptide derived from the N-terminal region of the fibrinogen Aα-chain. When discussing its physical properties, the molecular weight is a central metric for identification and purity verification. Most literature and analytical databases consistently report the molecular weight by HL Nossel · 1971 · Cited by 288 — molecules larger than a molecular weight of 34,000 showed no fibrinopeptide reactivity, whereas a similar filtrate of serum gave quantitative recovery of of human Fibrinopeptide A at approximately 1536.6 g/mol (often cited as 1536.56 or 1536.57 g/mol).
For researchers, these variations—often depending on the salt form or specific synthesis batch—are common. For instance, while the base peptide sits at 1536.6, modified versions like Fibrinopeptide A [Tyr0] can reach a molecular weight of 1699.76. Additionally, variations such as human acetate forms may show a distinct molecular formula (e.g., C65H101N19O28), resulting in a calculated molecular weight of 1596.65.
Contextualizing Fibrinop Other size, Get quote ; Other Forms of Fibrinopeptide A, human: Fibrinopeptide A, human TFA In-stock ; Molecular Weight. 1536.56 ; Sequence Shortening. eptide within Fibrinogen Systems
To understand the fibrinopeptide fully, one must look at the parent molecule. Fibrinogen is a 340 000 molecular weight hexamer, which serves as the precursor for Fibrinopeptide A (human) - Bachem AG these peptides. During biochemical enzymatic processes, the mass of the fibrinogen molecule is reduced as thrombin cleaves the specific sequences. This action is the primary mechanism by which Fibrinopeptides A and B are crucial for blood clot formation.
It is fascinating to compare these small segments to larger protein structures. For context, FXIII has a molecular mass of 325 kDa, demonstrating the significant scale difference between these regulatory peptides and the complex proteins that govern structural integrity in biological models.
Analytical Considerations and Observations
When documenting these peptides, keeping track of the formula and the precise mol mass is vital for experimental reproducibility. My personal experience with high-purity samples—typically those with purity > 95%—confirms that subtle differences in the molecular weight (such as the 1551.65 for certain B-type analogs or the 1570.7 for [Glu1]-Fibrinopeptide B) are critical indicators of the peptide’s specific modification state.
Whether you are working with Fibrinopeptide A or related structures, always ensure your documentation notes the specific salt form, as this significantly impacts the molecular weight (g/mol) recorded in your logs.
Summary of Key Data Points
* Standard Fibrinopeptide A: Commonly documented at 1536.6 g/mol.
* Fibrinopeptide B Variants: Often range from 1551.65 to 1570.7 depending on the specific sequence.
* Biological Context: Fibrinopeptide A is a substance released as blood clots in your body, functioning as a marker for enzymatic activity.
* Scale: While the peptide is small (~1.5 kDa), the parent molecule is a massive 340,000 molecular weight hexamer.
By maintaining rigor in documenting the molecular weight and physical characteristics of these peptides, one can better appreciate the intricate biochemistry that governs these molecular interactions. Always verify your specific batch data against the provided Fibrinopeptide A | C63H97N19O26 | CID 25078015 - PubChem technical specifications to ensure your research rem Apr 22, 2026 — HUMAN FIBRINOGEN ; Molecular Formula: C6H14O6 ; Molecular Weight: 182.17176 ; MDL Number: MFCD00131060 ; MOL File: 9001-32-5.mol ; MSDS File: SDS. ains accurate and consistent.