Stimulatory effect of CHI3L1 on tumor cells <i>in vitro</i>.

<p><b>A)</b> Purity of recombinant CHI3L1-Flag fusion protein (upper arrow); <b>B)</b> LLC cell proliferation treated with GST or CHI3L1-GST fusion protein; <b>C)</b> The apoptotic activity of LLC cells treated with GST or CHI3L1-GST fusion protein by Annexin V labeling assay. *, p<0.05, **, P<0.01.</p>