编辑“︁GFAJ-1”︁（章节）

==分类== 
{{cladogram|align=left|title= 
| clade= 
{{clade 
|style=font-size:75%;line-height:75% 
| label1= 
| 1={{clade 
      |1=''[[Thioalkalimicrobium cyclicum]]'' 
      |2={{clade 
         |1=''[[Thioalkalivibrio jannaschii]]'' 
         |2={{clade 
            |1=[[大肠杆菌]][[Escherichia coli O157:H7|O157:H7菌株]] 
            |2={{clade 
               |1={{clade 
                  |1={{clade 
                     |1=[[嗜碱盐单胞菌]]
                     |2=''[[Halomonas venusta]]'' NBSL13菌株
                     |3='''GFAJ-1''' 
                     |4=''Halomonas'' sp. GTW 
                     |5=''Halomonas'' sp. G27 
                     }} 
                  |2={{clade 
                     |1=''Halomonas'' sp. DH77 
                     |2=''Halomonas'' sp. mp3 
                     }} 
                  }} 
               |2={{clade 
                  |1=''Halomonas'' sp. IB-O18 
                  |2=''Halomonas'' sp. ML-185 
                  }} 
               }} 
         }} 
     }} 
}} 
}} 
|caption = GFAJ-1与相关细菌（基于[[核糖体DNA]]序列同源性）的[[种系发生]]<ref name=SupportingMaterial>{{Cite journal |last=Wolfe-Simon |first=Felisa |authorlink=Felisa Wolfe-Simon |coauthors=Blum, Jodi Switzer; Kulp, Thomas R.; Gordon, Gwyneth W.; Hoeft, Shelley E.; Pett-Ridge, Jennifer; Stolz, John F.; Webb, Samuel M.; Weber, Peter K.; Davies, Paul C.W.; Anbar1, Ariel D.; Oremland, Ronald S. |title=A bacterium that can grow by using arsenic instead of phosphorus: Supporting online material |journal=Science |date=2010-12-02 |doi=10.1126/science.1197258 |url=http://www.sciencemag.org/content/suppl/2010/12/01/science.1197258.DC1/Wolfe-Simon-SOM.pdf |format=PDF |accessdate=2010-12-02 |archive-date=2011-01-04 |archive-url=https://web.archive.org/web/20110104230937/http://www.sciencemag.org/content/suppl/2010/12/01/science.1197258.DC1/Wolfe-Simon-SOM.pdf |dead-url=no }}</ref>
}}

据对该细菌[[16S rRNA]]测序的结果，在[[系統樹|生命大家族的族谱]]中，GFAJ-1应与[[盐单胞菌科]]的其他[[亲盐类细菌]]具有[[亲缘关系]]<ref name="Science">{{cite journal |authors=费莉莎·沃尔夫－西蒙，等人 |year = 2010 |doi = 10.1126/science.1197258 |journal=[[科學雜誌|《科学》杂志]] |title = 一种能利用砷取代磷来生长的细菌 |language = en}}</ref>——这些细菌都是已知的可耐受高浓度砷环境的[[物种]]，它们都有从外界环境吸收砷的倾向——但GFAJ-1在这方面却更胜一筹：在缺乏磷元素的情况下，GFAJ-1能够吸收砷来取代含磷[[化合物]]中的磷从而继续存活下去。这种细菌能让砷参与其[[新陈代谢]]过程，甚至合成其生物[[高分子化合物]]。<ref name=Space/>