Acknowledgements:
SAXS data was collected at SIBYLS which is supported by the DOE-BER IDAT DE-AC02-05CH11231 and NIGMS ALS-ENABLE (P30 GM124169 and S10OD018483). This research was supported in part by the Intramural Research Program of the National Institute of Environmental Health Sciences, (Z01-ES102906, GAM) and the National Institute of Allergy and Infectious Disease NIAID-R21 AI135397. Also funded by the US Department of Agriculture: Agricultural Research Service (ARS-6054-43440-044-00D) and the National Institute for Food and Agriculture/National Peanut Board (NIFA-60-6054-7-003 SJM/BKH/JBN). The structures for A1LS, J2.1, J2.2, and J2.3 submitted to the Protein Data Bank and the Biological Magnetic Resonance Bank under the access codes PBD ID 7LXK BMRB 30875, PDB ID 7LVF BRMB ID 30870, PDB ID 7LVG BMRB 30871, and PDB ID 7LVE BRMB ID 30869 respectively.