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.
Raw data and 2D class averages. (a) A field of ring-like particles formed by incubating ICP8 with a 38-nt ssDNA oligomer and staining with uranyl acetate (see ‘Materials and Methods’ section). (b) The reference-free 2D class averages. The major classes are views from the top showing a ring of 9-fold symmetry and rectangular side views with a stack of two densities.
