deletions | additions       diff --git a/Building a 16S rDNA Phylogenetic Tree.md b/Building a 16S rDNA Phylogenetic Tree.md  index 951dc3b..6827574 100644  --- a/Building a 16S rDNA Phylogenetic Tree.md  +++ b/Building a 16S rDNA Phylogenetic Tree.md 
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and download the FastTree.c program by right clicking on it and saving the link to your Applications folder. To compile the software, navigate to your Applications folder in a Terminal window:  cd /Applications  Then, type:  gcc -O3 -finline-functions -funroll-loops -Wall -o FastTree FastTree.c -lm 
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gcc -O3 -finline-functions -funroll-loops -Wall -o FastTree FastTree.c -lm    Now, you should have a working version of FastTree. To build your tree, using the cleaned up RDP alignment, type: type the following (be sure the output name ends in ".tre" to ensure it will be recognized by Dendroscope):  /Applications/FastTree -nt RDP_alignemnt_clean.fa > tree_file.tre   The output name ends in ".tre" to ensure that it will be recognized by Dendroscope.  ##Viewing the Tree in Dendroscope  Download and install Dendroscope.  http://ab.inf.uni-tuebingen.de/software/dendroscope/