Two salt bridge pairs formed between A123His and B36Asp and B36Asp and A120His in the fifteenth structure model of the NMR ensemble (PDB ID: 2leh) of the SMN-Gemin2 complex [21].

In the first column, SB represents salt bridge, Inter-atomic distance includes both the distance between the two oppositely charged groups and the distribution of the distances between the two oppositely charged groups for the 32 NMR structure models in the SMN-Gemin2 complex. Color represents the color of the dash lines used to represent the salt bridges in Fig 2 in the main file. In the residue naming scheme here, such as B36Asp, B represents the chain ID used in the PDB file (PDB ID: 2leh), 36 represents the residue number, Asp represents the three-letter code for the amino acid.