730001L is a monomeric protein lacking cysteine residues.
Protein A binds the Fc portion of human IgG1, IgG2, IgG3 (weakly), IgG4, and mouse IgG1 (weakly), IgG2a, IgG2b, and IgG3. Protein A also binds IgG from monkey, rabbit, pig, guinea pig, dog and cat.