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Southern blot analysis of the TCRβ locus in DNA from tumors induced by MoFe2-MuLV. DNA from five MoFe2-MuLV-induced tumors (lanes a to e) and from an uninfected NIH-Swiss mouse (lane f) was digested with HpaI and hybridized to a murine TCRβ probe (23) as previously described (1). The arrows indicate the previously identified germ line HpaI fragments of 11.6 and 6.1 kb (9).
