Research Paper Volume 8, Issue 5 pp 841—847

Figure 1. Growth rate of primary rodent fibroblasts in 3% and 21% oxygen. The cells were cultured in either 3% or 21% oxygen atmosphere. The regression lines were fitted for the initial phase of linear growth, before the cultures became clonal. For each species the data is an average of at least 3 cultures, including both lung and skin fibroblasts, isolated from separate individuals, and error bars show s.d.