L-4-Aminoarabinose-bactoprenyl phosphate (L-4-Aminoarabinose-BP) is a substrate of the ArnT enzyme and participates in lipid A modification through covalent bonding. L-4-Aminoarabinose-bactoprenyl phosphate transfers L-4-aminoarabinose (Ara4N) to the lipid A portion of lipopolysaccharide (LPS), mediating cationic modification of lipid A, thereby conferring resistance to cationic antimicrobial peptides (CAMPs) in Gram-negative bacteria. L-4-Aminoarabinose-bactoprenyl phosphate is an endogenous intermediate synthesized in vivo by a series of enzymes such as ArnC and ArnD encoded by the arn operon in Gram-negative bacteria such as Escherichia coli.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.