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.
Representative examples of flow cytometric analyses of the surface expression of CTLA-4 (sCTLA-4) in studied groups of CLL patients and healthy controls. Grey histograms represent isotype controls. Numbers on histograms represent the percentage of the cells expressing CTLA-4 on the cell surface
