# Many 

By [Kittyzcac](https://paragraph.com/@kittyzcac) · 2021-10-28

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Most of these selenoproteins were redox proteins, which used Sec either to coordinate redox-active metals or for thiol/disulfide-based redox catalysis. Moreover, among 24 selenoprotein families detected in the symbionts’ metagenomic dataset, at least 17 (67 sequences, 81.7%) were homologs of known thiol oxidoreductases or possessed Trx-like fold ([Table 1](https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1976440/table/T1/)). Many of these selenoproteins contained a conserved UxxC/UxxS/CxxU/TxxU redox motif.

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*Originally published on [Kittyzcac](https://paragraph.com/@kittyzcac/many)*