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			Synchrotron SAXS 
		
        data from solutions of
        Mouse Kirrel3 ectodomain - Q128A mutant
		
		    in 
			10 mM HEPES pH 7.2, 150 mM NaCl, pH 7.2
		
 		were collected
		
		on the
		
			BioCAT 18ID beam line  
		
		
			at the Advanced Photon Source (APS), Argonne National Laboratory storage ring
		
		
			(Lemont, IL, USA)
		
		
		
			using a Pilatus3 X 1M detector
		
		
		
			at a wavelength of λ = 0.1033 nm
		
		(I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle).
                
                In-line size-exclusion chromatography (SEC) SAS was employed. The SEC parameters were as follows: A 425.00 μl sample
                at 2 mg/ml  was injected at a 0.60 ml/min flow rate
                onto a  GE Superdex 200 Increase 10/300  column
		
                        at 22°C.
		
			The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.
		
		 
            
                Storage temperature = UNKNOWN. Sample detector distance = UNKNOWN. Number of frames = UNKNOWN
		    
		 
	
				
					
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