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. Author manuscript; available in PMC: 2009 Oct 1.
Published in final edited form as: Exp Eye Res. 2008 Jun 27;87(4):394–397. doi: 10.1016/j.exer.2008.06.013

Figure 3.

Figure 3

Zinc attenuation of ERG a-wave response amplitude is reduced by histidine. The mean ΔVmax obtained from the relationship above fitted to each dataset for 75mM Na L-aspartate to which 100μM histidine had been added for 30 minutes is shown as a percent increase from the a-wave amplitude after 30 minutes in aspartate alone (left column, ±SEM, N=5). The mean ΔVmax of similar curves fitted to normalized responses recorded after adding 50μM zinc (middle column, ±SEM, N=4) or 50μM zinc plus 100μM histidine (right column, ±SEM, N=4) for the final 30 minutes following 40 minutes in aspartate show that the a-wave amplitude attenuation induced by zinc is reduced in the presence of histidine.