Does Tocris sell peptides by net peptide weight?
All peptides sold by Tocris are supplied by net peptide weight. As sold, peptides may contain counterions and residual water. Therefore, although the purity of a particular peptide may be quoted as that of 98%, the net peptide content may only be 70%. To compensate for this our peptides are weighed so that the amount of peptide received is exactly that stated on the vial. For example, for 1 mg of a peptide with 70% net content, 1.43 mg of material (1/0.
