Thermal Ellipsoids

Anisotropic B-factor data can be shown as thermal ellipsoids, axes, or ellipses with the aniso command or the Thermal Ellipsoids tool. The image shows myoglobin structure 1jw8 with thermal ellipsoid representations of the heme residue and protein sidechains that ligate or form H-bonds with the heme. Metal coordination bonds are shown as purple dashed lines and H-bonds as gold dashed lines.

For image setup other than position, see the command file myo-aniso.cxc (requires ChimeraX version 1.10 from February 2025 or newer).

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Neuraminidase Flowers

Influenza neuraminidase is an enzyme that promotes the spread of influenza virus among host cells. It is the target of oseltamivir and related antiviral drugs. The image shows tetramers of neuraminidase (PDB 3k3a) styled as flowers. Three tetramers are in different shades of pink, with a central metal ion in white and nearby residues in yellow, and a fourth tetramer is colored green to resemble leaves. Each monomer or “petal” is a six-bladed β-propeller. For image setup other than orientation, see the command file flowers.cxc. The Chimera Image Gallery includes a similar image.

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