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Figure 4 )
Many outdoors enthusiasts use a commercially available filter, life straw, or gravity feed system
[20] In animals, since sulfur uptake is primarily obtained through the diet in the form of cysteine or methionine, the regulation of sulfur metabolism is done via the transsulfuration pathway
doi: 10.1073/pnas.0510033103 36 RommelCBodineSCClarkeBARossmanRNunezLStittTNet al
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