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.
Assemblies with known structures can be observed in sucrose gradient fractions. The calculated final class averages (upper panels) and electron-density contour maps (lower panels) are shown after single-particle analysis of selected particles. Based on the proteins identified in the relevant fraction and the comparison with the published structures, the assemblies may correspond to: A, The small ribosomal subunit (30); B, The 26S proteasome complex (31). Scale bars: 20 nm.
