"The Effect of TripeptideCopper Complex on Human Hair Growth In Vitro." Annals of Dermatology, 2007
Cytokine+ 12:13914 Peristeris P, Clark BD, Gatti S, Faggini R, Mantovani A, Mengozzi M, Orencole SF, Sironi M, Ghezzi P (1992) N -acetylcysteine and glutathione as inhibitors of tumour necrosis factor production
Araque A, Castillo PE, Manzoni OJ, Tonini R
In organotypic hippocampal slice cultures, Dihexa and Nle-AngIV similarly augmented spinogenesis, with control slices showing 7 spines per 50-m dendrite length, compared to 11 for both Dihexa and Nle-AngIV treated slices [2]
However, the disulfide bonds can be formed in the mass spectra as a result of the electro spray ionization process (one-electron oxidation of thiol groups leads to the formation of thiyl radicals which rapidly dimerize) 54
Double check if you are using the correct needle size and injection technique