PEGylated amino acid is offered through custom synthesis service with 1-2 weeks turnaround. A linear PEG with an inert methoxy cap is attached to either the NH2 or COOH of the amino acid, or to the side chain of amino acid. For example, for L-lysine, PEG can be conjugated to either of the two amine groups or the carboxyl through a stable amide bond. MW of PEG could range from 200 Da to 40,000 Da.
Amino acid options include: Glycine, Alanine, Valine, Leucine, Isoleucine, Serine, Cysteine, Selenocysteine, Threonine, Methionine, Proline, Phenylalanine, Tyrosine, Tryptophan, Histidine, Lysine, Arginine, Aspartate, Glutamate, Asparagine, Glutamine.