A bacteria was discovered that contained an alternate form of the EPSPS enzyme, called CP4-EPSPS, that is not inhibited by glyphosate, the active ingredient in Roundup. The difference between the two genes that code for the enzyme are slight. A single point mutation in the gene switched the nucleotide guanine for cytosine, which causes the amino acid alanine to be substituted for glycine and prevents glyphosate from binding the enzyme, allowing the Shikimate pathway to function normally (Figure 4). The gene from the bacteria that codes for the CP4 form of EPSPS was modified by adding a promoter that is recognized by plants. This modified gene was inserted into soybean to create the Roundup Ready soybean. Since the soybean contains the CP4-EPSPS enzyme, which is not inhibited by glyphosate, the modified "Roundup Ready" soybean will not be killed by Roundup.