Fig 2.

Representative field of an electron micrograph of ice-embedded voltage-gated L-type Ca2+ channel. The channel particles are randomly oriented in the frozen-hydrated specimen. Some individual channel particles are circled. (Bar = 250 Å.)

Representative field of an electron micrograph of ice-embedded voltage-gated L-type Ca2+ channel. The channel particles are randomly oriented in the frozen-hydrated specimen. Some individual channel particles are circled. (Bar = 250 Å.)