“Gain of Function” Techniques Hidden in a 2015 Article Which Indicate CCP Bioweapon Program
This 2015 article demonstrates all the “gain of function” techniques needed to make COVID-19, amino acid substitution, viral re-assortment, serial passaging by animal model expert Chuan Qin. Many leads point to Changchun. Did Biao He bring ZC45 & ZXC21 to there for processing?
Let’s see how it wrote in the article about amino acid substitution, viral re-assortment, serial passaging.
Considering that the LPAI viruses in poultry also pose severe threat to human health, as observed in H7N9 viruses(Gao etal., 2013), the WTH7N129Y virus, which is a LPAI virus for poultry, is used for studying the pathogenesis of AIVs in this research. In the study, they used mice as a model system for studying the mamma-lian adaptation of a reassortant H7N1 avian influenza virus isolated from wild waterfowl and show that highly pathogenic variants can quickly emerge from a parental virus during limited serial passage. These adapted viral variants displayed expanded tissue tropism and increased replication kinetics in vitro and in vivo. Sequence analysis of adapted viruses identified multiple amino acid substitutions, including a lysine residue at PB2 position 627,that are likely involved in the adaptation of H7N1 avian influenza virus in mice.
The PB2-E627K sub-stitution has been consistently found to contribute to the adaptation of H5N1 and H7N7 highly pathogenic avian influenza viruses in mammals(Gabriel etal.,2005;Hattaetal.,2001).
It is still unclear how PB2 E627K mutation changes viral pathogenicity in mammals, although the difference in surface charge of the 627E- or 627K-containing domain of PB2 may affect PB2 interactions with other viral or cellular proteins(Kuzuharaetal.,2009). While the PB2 E627K substitution has been reported to confer increased virulence in mammals in the context of other avian influenza.
In Dr. Li-Meng Yan’s second and third report also talked about amino acid substitution and serial passaging.
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https://gnews.org/1309775/