Previous Article Next Article Table of Contents Science, Vol.332, No.6032, 917-917, 2011 DOI10.1126/science.1188535 Export Citation Response to Comment on "Positive Selection of Tyrosine Loss in Metazoan Evolution" Tan CSH, Schoof EM, Creixell P, Pasculescu A, Lim WA, Pawson T, Bader GD, Linding R Please enable JavaScript to view the comments powered by Disqus.