Myoglobin is shown to bind to mixed thin films of docosyl mesylate and methyl docosanoate. Myoglobin can be attached to films containing docosyl mesylate; however, films containing only methyl docosanoate exhibit only minimal myoglobin attachment. This indicates that myoglobin is specifically attached to the docosyl mesylate sites on the film surface. Surface coverage of myoglobin is dependent on the percentage of docosyl mesylate in the film. A maximum myoglobin coverage of approximately 1.2 x 10(12) myoglobin/cm(2) is estimated for films composed of between 22% and 30% docosyl mesylate.