REL PDBe PDBe PDBe 2007-04-02 2007-04-02 2008-05-17 2012-10-24 Jaalinoja HT Roine E Kivela H Butcher SJ Jaalinoja HT Roine E Laurinmaki P Kivela HM Bamford DH Butcher SJ PROC.NAT.ACAD.SCI.USA 105 8008 8013 2008 18515426 doi:10.1073/pnas.0801758105 SH1 subviral particle VP36- SH1 subviral particle VP36- 1 Haloarcula phage SH1 Haloarcula phage SH1 Haloarcula hispanica ARCHAEA capsid 800 28 VIRUS-LIKE PARTICLE STRAIN false false SH1 subviral particle VP36- singleParticle particle 7.2

40 mM Tris-HCl pH 7.2, 0.75 M Na2SO4, 40 mM MgSO4

400 mesh copper grid, Quantifoil R2/2 holey

ETHANE 90 HOMEMADE PLUNGER

Vitrification instrument: EMBL design

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 0.733 3.484 50000.0 49300.0 GATAN LIQUID NITROGEN 90 94 93

Low dose conditions.

KODAK SO-163 FILM ZEISS SCAI 7 58 Side entry liquid nitrogen-cooled cryo specimen holder 0 0

Each particle, wiener factor 0.2

I OTHER 10.5 FSC 0.5 CUT-OFF pft2, em3dr2, POR, P3DR 985