HIF-1 alpha (556-574) is a hypoxia-inducible factor-1 19-mer fragment. HIF-1 functions as master regulator of response to oxygen homeostasis. Hypoxia-induced gene expression is initiated when HIF-1subunit is stabilized in response to a lack of oxygen. This part of HIF-1 binds to the von Hippel-Lindau factor (VHL) an E3 ubiquitin ligase, and the proline 564 is absolutely vital to the binding process.

GSK-25 maintains good selectivity against a panel of 31 kinases, as well as RSK1 and p70S6K (RSK1 IC50 of 398 nM, p70S6K IC50 of 1000nM), and a dramatically improved P450 profile (>2.2 uM at all isozymes tested).

8-Hydroxy-3,5,6,7,3',4'-hexamethoxyflavone may have antifungal activity against phytopathogenic and human pathogenic fungi.