These siblings, wild-type or mutants, can provide abundant material for comparing the role of genetic and environmental factors in the process of cognitive aging.
In order to rule out the contribution of background mutations, follow-up experiments using RNAi knockdowns or transgenic rescue of the mutants can provide required validation of the results presented here.
Therefore, developmental studies, including the characterization of zebrafish mutants, can provide a roadmap or blueprint to re-establish or augment cellular differentiation or tissue function to aid regenerative repair in vivo, or in vitro for the stepwise production and expansion of stem and progenitor populations for therapeutic cellular replacement strategies.
Other false negative predictions require additional information beyond what the single-gene knockout mutant library can provide.
Expression profiling of neuroblasts and GMCs from wild type and mutant embryos can provide this information, and provide greater insight into the biological function of each of the transcriptional regulators (see, for example, Choksi et al, 2006).
Using the simulation curves, even a smaller-scale pilot experiment that screens as few as 30 50 mutant clones can provide an estimate of the essential gene number for a given biological process.
On the basis of these data and structures of wild-type OYE 2.6 and the Tyr78Trp single mutant, we can provide a rationale for the experimental results observed during library screening.
It is interesting that the observations of Cherry, Jin et al. are not inconsistent with several previous observations in mammalian cells, such as the finding that CMT2B mutant proteins can provide essential, native Rab7 functions (Spinosa et al., 2008; McCray et al., 2010).
We reasoned that since the ldox mutant accumulates leucoanthocyanidin which can provide the substrate for a heterologous LAR protein, the ldox mutant was potentially a good in vivo model to analyze LAR function.
For example, induction of auxotrophies by mutagenesis in industrial strains unable to sporulate (and thus unfit for use in sexual hybridization experiments) can provide mutants with appropriate selection markers for rare mating or protoplast fusion experiments.
