requires thiamine pyrophosphate [TPP]: Measurement of red blood cell transketolase activity is a convenient bioassay to test for TPP deficiency
For influenza A, there are at least 18 hemagglutinin (HA) and 12 neuraminidase (NA) subtypes, with group 1 and group 2 species sharing only ~37% sequence homology for HA and NA proteins and only ~25% sequence homology with influenza B species (reviewed in ref
Mass Spectrometry (MS): While HPLC verifies purity, MS verifies identity
This copper-binding capacity enables GHK-Cu to participate in redox reactions, influence gene expression patterns, and regulate enzymatic activities critical to tissue homeostasis
W., Rhone, E
Bioprocess Biosyst Eng 33:675682 Liao X, Deng T, Zhu Y, Du G, Chen J (2007) Enhancement of glutathione production by altering adenosine metabolism of Escherichia coli in a coupled ATP regeneration system with Saccharomyces cerevisiae