REL PDBe PDBe PDBe 2010-01-12 2010-03-10 2010-03-11 2011-09-09 Happonen LJ Redder P Peng X Reigstad LJ Prangishvili D Butcher SJ Archaeal, virus, icosahedral, extremophilic Happonen LJ Redder P Peng X Reigstad LJ Prangishvili D Butcher SJ J.VIROL. 84 4747 4754 2010 20164227 doi:10.1128/JVI.02156-09 STIV2 virus STIV2 virus 1 Sulfolobus turreted icosahedral virus 2 Sulfolobus turreted icosahedral virus 2 Sulfolobus islandicus ARCHAEA 710 31 VIRION STRAIN false false STIV2 singleParticle particle 3.5

50 mM sodium citrate, pH 3.5

NEGATIVE

Vitrified. Grids were blotted for roughly one second before being plunged into liquid ethane.

Quantifoil-grids

ETHANE HOMEMADE PLUNGER

Vitrification instrument: Guillotine

A small vial of ethane is placed inside a larger liquid nitrogen reservoir. The grid holding 3 microliters of the sample is held in place at the bottom of a plunger by the means of fine tweezers. When the liquid ethane is ready, a piece of filter paper is then pressed against the sample to blot off excess buffer, sufficient to leave a thin layer on the grid. The filter paper is removed, and the plunger is allowed to drop into the liquid ethane. Once the grid enters the liquid ethane, the sample is rapidly frozen, and the grid is transferred under liquid nitrogen to a storage box immersed in liquid nitrogen for later use in the microscope. FEI TECNAI F20 FLOOD BEAM BRIGHT FIELD FIELD EMISSION GUN 200 2.0 0.5 5.2 68000.0 66400.0 GATAN LIQUID NITROGEN

Low dose conditions

GATAN ULTRASCAN 4000 (4k x 4k) 4.42 358 18 Side entry liquid nitrogen-cooled side entry holder

Each micrograph

I OTHER 20.0 FSC 0.5 CUT-OFF PFT, POR, EM3DR2, P3DR 713