Please read this amazing article, it explains a patent, specifically formulated to test the purity and biological activity of rhGH.
http://www.patentstorm.us/patents/57...scription.html
"Additionally, the wrong choice of manufacturing conditions or formulation may lead to
improperly folded polypeptide chains which are biologically inactive. Hence, further methodologies capable of analysis of the protein conformation are needed."
^^
This would be our greatest fear as we know the conditions of some labs in china are not legislated and inspected like those are in other countries with stricter laws. So basicly the company could be making REAL hGH, but due to poor conditions it is biologically inactive.
"currently, the analysis of biopharmaceuticals relies heavily on the use of sophisticated methods for the demonstration of the structural identity, homogeneity and purity of the products. These methods include amino acid and carbohydrate analysis, N- and C-terminal sequence analysis, spectroscopic (UV, CD, ORD) analysis, peptide mapping, electrophoresis, chromatographic purity profile methods, potency/activity assays, etc. It must be emphasized that no one method is considered to be sufficient in itself, and that multiple methods are necessary to completely characterize and/or control such products."
^^ Those above are the current methods to test purity of protein-based recombinant technology creations.