<p>Adenosine is bound to albumin in plasma, however data regarding the extent of binding are not readily available.<sup class="text-reference-group"><a class="reference-popover-link" data-content="Cui F, Wang J, Li F, Fan J, Qu G, Yao X, Lei B: Investigation of the Interaction between Adenosine and Human Serum Albumin by Fluorescent Spectroscopy and Molecular Modeling Chinese Journal of Chemistry. 2008 Apr 16;26(4):661-665." href="#reference-A229808">3</a></sup></p>