Table 1: Effect of methyl mercury chloride treatment of rats on maximum response ( ) and sensitivity (pD2) to acetylcholine, sodium nitroprusside, and isoproterenol in endothelium intact aortic rings.

pD2 pD2 pD2

Methyl mercury chloride treated

Results are expressed as % of the previous contraction to phenylephrine and pD2 is expressed as −log one half; versus untreated.