The biological activity is measured using a 3-day MTT assay.
Other Notes
2.5S subunit of nerve growth factor-7S (NGF-7S) is essentially the β-subunit when isolated from male mouse submaxillary glands under initially dissociative conditions by a modification of the method of Bocchini and Angeletti.
Physical form
Lyophilized from a 0.2 µm filtered solution in sodium acetate buffer.