D 5904 (OTTO) Decyl β-D-maltopyranoside, ≥98% Cas no 82494-09-5 - used in a study to assess α-helical membrane protein crystallization. D 5904 (OTTO) Decyl β-D-maltopyranoside, ≥98% Cas no 82494-09-5 - used to solubilize and stabilize membrane proteins.