This is a sources sought notice from the FDA to identify qualified small businesses capable of supplying cryopreserved human hepatocytes and associated materials for regulatory science research. The required deliverables include 24 vials from four female donors, thawing and incubation media, and protocol documentation, with performance expected within six months from award. Services must be delivered to Silver Spring, MD, within seven days of award, Monday through Friday, 9:00 AM to 3:00 PM. The applicable NAICS code is 325414, with a small business size standard of 1,250 employees. No budget amount or submission timeline is specified.