Why you don't see VG Ca channels with a protocol for VG Sodium channel?

quejada

New member
Nov 16, 2015
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#1
This might sound like a very dumb question, but anyway: I am recording Na and K currents from isolated neurons. I am using standard IV protocols, and I see nice inward fast currents (Na) and outward K currents. but my doubt is: when doing a protocol for Na channels, why do I see only currents through sodium channel and not also Calcium? The VG Ca channel should open in a similar voltage range to the Na channel so why the current I record is only by Na?

many thanks

g