Derived from a 13 year old female caucasian. Cells are sensitive to both virus and chemical transformation and exhibit a flat morphology, low saturation density and low plating efficiency in soft agar. HOS and 143B (Sigma Catalogue number 91112502) originated from the same host: 143B is TK- and originated indirectly from HOS which is TK+ (Skovgaard et al 2010 PMID: 20544518).
Split sub-confluent cultures (70-80%) 1:3 to 1:6 i.e. seeding at 2-4x10,000 cells/cm2 using 0.25% trypsin or trypsin/EDTA; 5% CO2; 37°C.
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