history of molecular evolution
...that Linus Pauling and Emile Zuckerkandl proposed using protein sequences to estimate the time since genetic divergence, early in the history of molecular evolution research?
...that <a href="./Linus_Pauling" id="mwA04" rel="mw:WikiLink" title="Linus Pauling">Linus Pauling</a> and <a href="./Emile_Zuckerkandl" id="mwA08" rel="mw:WikiLink" title="Emile Zuckerkandl">Emile Zuckerkandl</a> proposed using protein sequences to estimate the time since <a href="./Genetic_divergence" id="mwA1A" rel="mw:WikiLink" title="Genetic divergence">genetic divergence</a>, early in the <b id="mwA1E"><a href="./History_of_molecular_evolution" id="mwA1I" rel="mw:WikiLink" title="History of molecular evolution">history of molecular evolution</a></b> research?