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The question you have asked is a really interesting one , and I like the way it arose . Abstract : The dopamine ( DA ) transporter ( DAT ) regulates DA neurotransmission by recycling DA back into neurons . In fact , some people lack the enzyme that synthesizes the H antigen in saliva and on some skin cells . Then I think , as I walk up through the stone entryway , I 'm sure my name did n't make it onto the list , but it did . If we make a gel that has a pH gradient , the protein will migrate until the point at which its electric charges cancel out and electrophoresis no longer has any means to move the proteins . Off-stage , there are over twenty working models ( including Friend N ) : dressed as French maids , pixies , or cowgirls mingling with the crowd ; genies dancing in huge genie bottles , cushioned , right out of I Dream of Jeannie ; girls in sleepwear jumping on a trampoline on a giant platform " bed " ; girls in swimwear playing in an enormous " bathtub " ; the list goes on . The components of the cell membrane , the biological structure that marks the point of delineation between what is alive and what is not , can be induced to form sheets and spheres without direct human manipulation . This helps the NaCl dissolve by separating ; and concerning the question , there is simply not enough energy associated with the hydration to cause the hydrogen and oxygen atoms to separate and reform bonds with chlorine and oxygen . The question of how infants acquire a native language is a focus of my own research . Amphetamines are thought to function by essentially reversing the dopamine transporter ( DAT ) so that it spills dopamine into the synaptic cleft in an unregulated fashion . The point is that there are those who believe that our perception creates what we think of as reality , just as our brain alters and manipulates the image projected onto our retina to help make sense of what we " see .