Table 1.

Molecular weights of SOD enzymes isomers in C. elegans, D. melanogaster and E. coli

Organism C. elegans	Protein Length (aa)	Subunit Mol.wt (Estimated)/	Isoelectric Point (pI)
SOD-3/MnSOD	218	24.6 kD	8.43
(Inducible; Hunter et al., 2015)		Tetrameric
SOD-2/MnSOD (constitutive)	221	25.5 kD Tetrameric	7.77
SOD-1, Isoform a/Cu-Zn SOD	180	18.7 kD Dimeric	6.14
SOD-1, Isoform b/Cu-Zn SOD	158	16.2 kD Dimeric	6.14
SOD4, Isoform a	176	18.2 kD Dimeric (?)	6.43
SOD4, Isoform b	221	23.3 kD Dimeric (?)	6.22
SOD-5	178	18.5 kD	5.42
D. melanogaster
SOD-2/MnSOD	217	24.7 kD	8.10
SOD-1, PA	153	Tetrameric 15.7 kD	6.06
Cu-Zn SOD		Dimeric
E. coli
SOD-2/MnSOD	206	25.2 kD Dimeric and Tetrameric	6.88
FeSOD	192	21.9 kD	5.91
SOD-1 (Cu-Zn SOD)	173	15.6 kD Dimeric	6.53

Most subunit information obtained from Sheng et al (2014)