Detailed Review,Formula Weight. 2272.5

The flg22 peptide is a crucial molecule in plant immunity, acting as a potent elicitor that triggers defense responses. Its effectiveness is closely tied to its specific structure and properties, including its molecular weight. Understanding the flg22 peptide mw is essential for researchers and scientists working with this peptide in various applications.

The flg22 peptide is a 22-amino acid fragment derived from the N-terminal region of bacterial flagellin, the primary component of bacterial flagella. This conserved domain is recognized by plant immune systems, initiating a cascade of signaling pathways. While the exact molecular weight can vary slightly depending on the specific source and any modifications, the generally accepted values fall within a narrow range.

Several sources indicate specific molecular weight values for the flg22 peptide. For instance, some provide a Molecular Weight of 2272.48. Others list a Molecular Weight of 2229.47, or a Formula Weight of 2272.5. The value of 2,272.48 g/mol is also frequently cited. These figures are derived from the amino acid sequence and the atomic masses of the constituent elements. For example, one detailed analysis shows a Molecular Weight of 2272.46 for the flg22 peptide derived from *P. aeruginosa*, with a Molecular Formula of C93H162N32O. Another common value is Theoretical MW: 2272.5 g/mol.

It's important to note that while the flg22 peptide itself is around 2.2 kDa, the entire flagellin protein has a much larger mass, typically around about 40,000 daltons. The flg22 peptide represents the biologically active epitope responsible for eliciting immune responses.

The precise determination of the flg22 peptide mw is typically achieved through techniques like mass spectrometry. For example, a Certificate of Analysis for an FLG22 PEPTIDE might report an Average 2272.5 via mass spectroscopy, with a specific reading of 2272.47.

Beyond its molecular weight, the flg22 peptide has other significant characteristics. Its sequence, such as QRLSTGSRINSAKDDAAGLQIA-OH, is key to its function. The flg22 peptide is known to activate pattern-triggered immunity (PTI) in plants, leading to a decrease in the expression of genes involved in growth. It plays a vital role in the innate immune system of plants, akin to how certain peptides function in animal immunity.

The flg22 peptide can be synthesized and is available commercially for research purposes, often in powder form. For example, Flg22-Bt Peptide is a synthetically produced peptide containing 22 amino acids. Researchers also explore variations, such as flg22 peptides from different bacterial species like *P.s. tabaci* or *A. tumefaciens*, which may have slightly different molecular weights (e.g., Molecular Weight of 2266.41).

The study of flg22 peptides extends to understanding their trafficking within plants. Research indicates that receptor-mediated endocytosis enables flg22 internalization, leading to its movement through vacuoles, entry into the vasculature, and mobilization to distal tissues. This highlights the complex biological journey of this peptide within the plant system.

In summary, the flg22 peptide mw is a critical parameter for researchers. While most commonly cited values hover around 2272.5 g/mol, slight variations exist due to the specific origin and synthetic process. This precise molecular identity, along with its 22-amino acid sequence, underpins its potent role in plant immunity and its utility as a research tool.