Do you offer any heavy amino acids other than the ones in the SILAC Protein Quantitation Kits?
We offer additional isotopes of lysine, including 4,4,5,5 D4 L-Lysine-2HCl (Cat. No. 88437) and 13C6 15N2 L-Lysine-2HCl (Cat. No. 88209), which can be used for multiplexed experiments. 13C6 L-Arginine-HCl (Cat. No. 88210) and 13C6 15N2 L-Arginine-HCl (Cat. No. 89990) are also available to enhance peptide isotope label coverage of tryptic peptides. In addition to lysine and arginine, 13C6 L-Leucine (Cat. No. 88435) can also be used with our powdered SILAC DMEM (Cat. No. 88425) and RPMI-1640 media (Cat. No. 88426). Please check the product page for a current listing.