Phospholipid polyethylene glycol folate (dspe-peg-fa), carboxyl group and amino group form amide bond. This reaction makes folate ligand attach to protein, antibody, peptide or particle surface. Pegylated folate has good water solubility and bioactivity. Folate functionalized substrates have been used for targeted drug delivery, imaging and bioassay. DSPE (1,2-distearyl-sn-glycerin-3-phosphate ethanolamine) is a saturated 18 carbon phospholipid, which is commonly used in the synthesis of liposomes. Polyethylene glycol (PEG) - coupled DSPE is hydrophilic and can be used for drug delivery, gene transfection and biomolecular modification.

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.