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AJP - Heart and Circulatory Physiology, Vol 264, Issue 5 1472-H1477, Copyright © 1993 by American Physiological Society
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H. Uchizumi, R. Hattori, K. Sase, W. J. Cai, K. Kadota, S. Sasayama, C. Kawai and Y. Yui
Department of Internal Medicine, Faculty of Medicine, Kyoto University, Japan.
It has been known that cytotoxic-activated macrophages release an unstable vasorelaxing substance, nitric oxide. We have found that a more stable relaxing factor is released from those cells. This factor seems to be synthesized from L-arginine. It acts through the activation of soluble guanylate cyclase without affecting membrane potential. It has little charge at nearly neutral pH, and its molecular weight is < 500.
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