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    <location>ordb.biotech.ttu.edu</location>
    <date>4/4/2026 1:35:53 PM</date>
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          <att_value att_id="a50" value="CA3 Pyramidal neuron terminals (T)" />
          <att_value att_id="a677" value="o242607" serial_no="1" value_object_name="Quantitative autoradiography has been used to localize sites at which L-[3H]-glutamate is displaced by NMDA. The labelling of these receptors was somewhat lower than in CA1 overall, being highest in s. oriens and s. radiatum and very low in s.pyramidale and s. lucidum " />
          <att_value att_id="a677" value="o242419" serial_no="2" value_object_name="In contrast, a study using radioactive in situ hybridization histochemistry looked at mRNA coding an NMDA glutamate binding protein and at NMDAR1 (an NMDAR subunit) expression and found heavy labeling for both in the pyramidal and polymorphic layers but little in the molecular layer " />
          <att_value att_id="a677" value="o242755" serial_no="3" value_object_name="The physiology of these receptors has been studied in outside-out patches from the proximal apical dendrites. It was found that an APV-sensitive component of the synaptic current evoked by fast aplication of glutamate could be isolated (and was presumed to be the result of NMDA channel opening). It was calculated that NMDA channels had a main conductance state conductance of 45 pS and it was confirmed that the channel was permeable to Ca2+. The NMDAR-mediated conductance was blocked by Mg2+ in a voltage-dependent way and by Zn2+ in a non-voltage-dependent fashion " />
          <att_value att_id="a677" value="o242641" serial_no="4" value_object_name="see also " />
          <att_value att_id="a677" value="o242541" serial_no="5" value_object_name="NMDA iontophoretically applied to basal dendrites evoked inward currents near resting potential. Changing levels of bath calcium concentration downwards by 50% caused an increase in the inward current " />
          <att_value att_id="a677" value="o242522" serial_no="6" value_object_name="MK801 (an NMDAR antagonist) blocks the transient intracellular Ca2+ release normally associated with stratum lucidum stimulation (found by simultaneous Ca imaging and intracellular recording in rat brain slices by " />
          <att_value att_id="a677" value="o242842" serial_no="7" value_object_name="While NMDA receptor activation may be necessary for LTP at the commissural/associational synapses " />
          <att_value att_id="a677" value="o242483" serial_no="8" value_object_name="it has been shown to occur at mossy fiber synapses even in the presence of NMDA receptor antagonists under certain conditions " />
          <att_value att_id="a677" value="o242039" serial_no="9" value_object_name="" />
          <att_value att_id="a677" value="o242295" serial_no="10" value_object_name="Differential induction of potentiation and depression at commissural and mossy fiber synapses has also been shown by " />
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