BLIN-3 cultures acquire increasing amounts of surface μ as a function of time in culture.

Individual cryopreservations of BLIN-3 were thawed, cultured for differing lengths of time, and analyzed for surface μ heavy-chain expression. Times in culture before analysis were as follows: BLIN-3A, 30 weeks; BLIN-3B, 26 weeks; and BLIN-3C, 9 weeks.