the possibility that the biological activity of aip might be due to contamination by bacterial lipopolysaccharides ( lps ) or lipid a-associated protein ( lap ) was ruled out for the following reasons : ( i ) polyclonal b-cell activation by aip was shown in spleen cell cultures of c3h/hej mice , a low responder strain to lps ;
C0023767
lipid a
C0023810
lps