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.
(A) Dixon plots of protein tyrosine phosphatases 1B (PTP1B) inhibition by Shikonin at various substrate (pNPP) concentrations (5, 10, 15, 20, and 25 mM). (B) Lineweaver–Burk plot for inhibition of PTP1B by Shikonin was analyzed in the presence of different concentrations of Shikonin (0, 2, 4, 8, and 16 µM).
