div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: H1 and H2 receptors in the histamine-induced accumulation of cyclic AMP in guinea pig brain slices src=https:reader035fdocumentsusreader035viewer2022080321575068511a28ab0f07af9ae4html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp© 1975 Nature Publishing Grouppdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: H1 and H2 receptors in the histamine-induced accumulation of cyclic AMP in guinea pig brain slices src=https:reader035fdocumentsusreader035viewer2022080321575068511a28ab0f07af9ae4html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divp© 1975 Nature Publishing Grouppdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb alt=Page 3: H1 and H2 receptors in the histamine-induced accumulation of cyclic AMP in guinea pig brain slices src=https:reader035fdocumentsusreader035viewer2022080321575068511a28ab0f07af9ae4html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divp© 1975 Nature Publishing Grouppdiv