In fact, mutant pups in the C57BL/6 genetic background had a median survival of 5 days (Bortolussi et al., 2012), whereas those in the FVB/NJ genetic background survived longer, with a median survival of 11 days.
Cott describes simple experiments such as that fish that have changed colour to match a pale background survived better (64% to 42%) on such a background than fish which had not.
Less than 20% of BVE mice on the Npc2 +/hypo background survived until the senescent stage (9 10 weeks p.p). (Fig 6A).
Because 11 of 25 Tigm Gga2 −/− mice in the mixed background survived beyond 3 wk, it was conceivable that these mice might express more GGA2 than do the Tigm Gga2 −/− mice in the C57BL/6NJ background.
For example, homozygous embryos of the ENU mutant Mks1 krc die at around 13.5 dpc on a C3H background but survive up to 18.5 dpc on a mixed CD1/C3H background (Weatherbee et al., 2009).
We also show that Fras1 is upregulated as MM differentiates into nephrons, with Fras1 immunolocalizing in nascent glomeruli in a BM-like pattern, and we demonstrate that bl and my mutants maintained in a mixed background sometimes survive into adulthood; these mice have two kidneys, which contain subsets of defective glomeruli.
Prof. Nicolas Cowan, an astronomer at McGill University in Canada, thinks Planet 9 might even show up in surveys of the cosmic microwave background, the surviving light from the Big Bang.
By day 18, IL-6 (15-fold) and KC (4-fold), were significantly above background in surviving ΔclpB- immunized mice.
By day 18, only IL-6 levels (8-fold) were significantly above background in surviving mice immunized with ΔclpB.
By day 14 of infection, most cytokines and chemokines were declining towards background in surviving mice immunized with ΔclpB, whereas the opposite trend was observed for mice immunized with ΔfupAΔcapB.
