• Figure 1.
    Download figureOpen in new tabFigure 1. A TRPV4 channel (pink) inserted in the membrane with a ferritin complex (green) attached on the cytoplasmic side, approximately to scale.

    The magnetic field B induces a moment m in the ferritin core, leading to a force F or a torque N on the ferritin particle, and resulting forces tugging on the channel. See text for details.

    DOI: http://dx.doi.org/10.7554/eLife.17210.003

    Figure 2.
    Download figureOpen in new tabFigure 2. The steady-state temperature profile around a heated sphere in an infinite bath varies inversely with the distance from the center of the sphere.

    The same argument applies to a ferritin sphere heated from its magnetic core (top) and a spherical cell with a large number of heated ferritins on its surface (bottom).

    DOI: http://dx.doi.org/10.7554/eLife.17210.004