A number of ELISA Kits are available that target nitrogen fixation gene 1 (S. cerevisiae), an alias of the protein, NFS1 cysteine desulfurase. The human protein, encoded by the gene NFS1, is a member of the Class-V pyridoxal-phosphate-dependent aminotransferase family, NifS/IscS subfamily. The protein's cellular localization is indicated to be cytoplasmic, nuclear and mitochondrial. Additional synonyms or past names for this protein may include: HUSSY-08, IscS, NIFS. Homology is conserved in other species, such as Mouse, Rat, Yeast, Arabidopsis, Zebrafish, Frog.