a_et_al_2004</span><span 
	 style="font-size: 11.0pt;">) with the gamma model corrects for multiple 
 hits, taking into account the rate substitution differences between nucleotides 
 and the inequality of nucleotide frequencies.&#160;&#160;In this distance, 
 evolutionary rates among sites are modeled using the gamma distribution.&#160;&#160;You 
 will need to provide a </span><u style="text-underline: double;"><span 
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