Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Reversed-phase HPLC of the PQQ. (A) Reversed-phase HPLC chromatogram of the methanol extracted quinones associated with the purified acetaldehyde dehydrogenase complex (3.0 mg of protein) of Ga. diazotrophicus. (B) The system was calibrated with commercial standards: PQQH2 (commercial form) and commercial PQQH2 oxidized with ammonium persulfate, Q7, and Q10 (retention times of 4.28, 6.8, 9.28, and 11.19 min, respectively).
