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) Cytofectin structural components. The chemical structures of the cytofectins used in this paper where n = 1, 3, 5 or 7. The cytofectins contained either a primary alcohol or primary amine group. (B) Structures of the divalent anions used in this study.
