title: removing sublists from a list
body: <p>I have list of 155 elements, eahc contain 3 lists.</p>
  
  <p>below I made an small example. I am only interested in keeping values in <code>gene</code> and am trying in <code>R</code> to remove first and second list of each element all at once! leaving me only values in gene.</p>
  
  <pre><code>test &lt;- list(name="Adipose", desc= "Roche", gene = c("KRT14", "RPE65"))
  test1 &lt;- list(name="muscle", desc= "Roche", gene = c("THRSP", "KRT14"))
  test2 &lt;- list(name="WBC" , desc= "Roche", gene = c("RBP4", "CCDC80"))
  x &lt;- c(test,test1, test2)
  </code></pre>
  
  <p>How to achieve that?</p>