Patent ID: 7374762

Claim:
A composition comprising (i) a therapeutically effective amount of about 1-5 mg/ml of a conjugate comprising humanized antibody huN901 chemically coupled to a maytansinoid that is N 2′ -deacetyl-N 2′ -(3-mercapto-1-oxopropyl)-maytansine (DM1) or N 2′ -deacetyl-N 2′ -(4-mercapto-4-methyl-1-oxopentyl)-maytansine (DM4), (ii) about 10 mM sodium citrate buffer, (iii) about 0.01% polysorbate 20, (iv) about 120 mM sodium chloride, and (v) water, wherein the pH of the composition is about 5.5.