*histamine receptors*

*4 (KNOWN) HISTAMINE RECEPTORS*

*H1*

*H2*

*H3*

*H4*

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**SKETCHES**

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|/\-*WIKI-LINK*-/\|

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☜*“RECEPTORS”* ☞

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☜*“HISTAMINE”* ☞

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* *TABLE OF CONTENTS* *

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*we won the war*