MAQVQLVESGGGLVQPGGSLRLSCAASGRAFTMYAMGWFRQAPGEERAYIAGITWNGLSTYYADSVKGRFTISRDNAKNTVYLQMGSLKPEDTAVYYCAATRRSLTTATTDADAWGQGTQVTVSSGHHHHHH
The protein construct used for SAXS contains a C-terminal polyhistidine tag.