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.
Transmission electron microscopy; staining with uranyl acetate. The internal bacterial structure: electron-dense crystal-like (CL) structures located in the center of almost all bacteria. Multilayer sheath-like (SL) structure are alternating electron dense (6 nanometers), electron light (15 nanometers) layers (upper left).
