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.
Generalized structure of major polyzwitterion classes. From left to right: Ammonio phosphates (I, specifically for R* = –CH2–CH2–: phosphatidylcholines), ammonio carboxylates (II, carboxybetaines), ammonio sulfonates (III, sulfobetaines), and ammonio sulfates (IV, sulfabetaines).
