Effects of NaHS on the free sulfhydryl groups of L-type calcium channel in H9C2 cells, and a schematic picture showing L-type calcium channel and the other protein molecules involved in myocardial contraction that might react with H₂S with their sulfhydryl groups.

<p>In the NaHS group, the L-type calcium channel containing free sulfhydryl groups/total protein of L-type calcium channel ratio in H9C2 cells decreased obviously, compared with that of the control group. ^**<i>P</i><0.01 vs control group.