affilins
... that affilins are proteins that can bind antigens just like antibodies, despite having quite a different structure?
... that <b id="mwFio"><a href="./Affilin" id="mwFis" rel="mw:WikiLink" title="Affilin">affilins</a></b> are <a class="mw-redirect" href="./Proteins" id="mwFiw" rel="mw:WikiLink" title="Proteins">proteins</a> that can bind <a href="./Antigen" id="mwFi0" rel="mw:WikiLink" title="Antigen">antigens</a> just like <a class="mw-redirect" href="./Antibodies" id="mwFi4" rel="mw:WikiLink" title="Antibodies">antibodies</a>, despite having quite a different structure?