GFAJ-1 uses adenosine triarsenate as its energy currency

the verdict

REFUTED

the evidence says no

Recorded sources

0 sources for · 3 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

The claim that GFAJ-1 uses adenosine triarsenate as its energy currency has been refuted by subsequent studies demonstrating that the bacterium is strictly phosphorus-dependent and uses specialized mechanisms to tolerate high levels of arsenic rather than incorporating it into its biochemical structure.

The analysis

Initial claims suggesting that Halomonas sp. strain GFAJ-1 could substitute arsenic for phosphorus in macromolecules were thoroughly debunked by independent teams using ultrapure reagents. The consensus in the literature (e.g., Erb et al., Reaves et al., and subsequent genomic analyses) shows that GFAJ-1 is phosphorus-dependent and relies on arsenic detoxification and efflux mechanisms rather than utilizing arsenate-based metabolic currencies.

Evidence against · 3

Absence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells

Recorded source metadata

Marshall Louis Reaves, Sunita Sinha, Joshua D. Rabinowitz, Leonid Kruglyak, Rosemary J. Redfield. Absence of Detectable Arsenate in DNA from Arsenate-Grown GFAJ-1 Cells. 2012. https://doi.org/10.1126/science.1219861

Studies demonstrating that GFAJ-1 is a phosphate-dependent organism rather than an arsenic-based life form.

Source citation format

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More against · 2

GFAJ-1 Is an Arsenate-Resistant, Phosphate-Dependent Organism

Recorded source metadata

Tobias J. Erb, Patrick Kiefer, Bodo Hattendorf, Detlef Günther, Julia A. Vorholt. GFAJ-1 Is an Arsenate-Resistant, Phosphate-Dependent Organism. 2012. https://doi.org/10.1126/science.1218455

Follow-up research confirming GFAJ-1 requires phosphate for growth and does not substitute arsenate into its vital biomolecules.

Source citation format

Signature Arsenic Detoxification Pathways in <i>Halomonas</i> sp. Strain GFAJ-1.

Recorded source metadata

Wu S, Wang L, Gan R, Tong T, Bian H, Li Z, Du S, Deng Z, Chen S. Signature Arsenic Detoxification Pathways in <i>Halomonas</i> sp. Strain GFAJ-1.. 2018. https://doi.org/10.1128/mbio.00515-18

Comprehensive genomic and phenotypic analysis showing that GFAJ-1 relies on specialized arsenic detoxification and efflux systems rather than incorporating arsenic into its core biochemical currency.

Source citation format

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first checked01 Aug 2026

judged → REFUTED · 1301 Aug 2026

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