diff --git a/wiki/pages/proof-of-concept.html b/wiki/pages/proof-of-concept.html
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         <p style="text-align: center; font-size: 0.9em; margin-top: 10px;">fig 3 Muscone-induced lactate measurement results of the treatment system. (gal: induced by galactose; glc: induced by glucose; mus: induced by muscone)</p>
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        <p>We have simultaneously introduced the muscone molecular switch and the downstream lactate dehydrogenase into Saccharomyces cerevisiae, constructing a complete therapeutic system within the organism. After induction with muscone, we tested the content of D-lactic acid in the culture supernatant. The experimental results demonstrate that our complete therapeutic system can achieve specific secretion of lactic acid. For further discussion on the experimental results, please refer to <a href="https://2024.igem.wiki/tsinghua/therapy-system" style="color: #FF5151" >Therapy system</a>.</p> 
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