Second, we chose this set of four miRNAs for further testing not only on the basis of their validated, altered expression in response to SP (File S1; Table S1; Figure S1; Figure S2), but also on the availability of loss-of-function mutations (Materials and Methods, below).
Out of the 70 patients from Cohort 1 sequenced for point mutations, material for MLPA-analyses was available from 66 (all included among the 69 analyzed for ATM expression levels).
We were also able to define putative recombinant segments, as done previously [6], [13], using the very different distribution of SNPs introduced by recombination from those arising by mutation (see Materials and Methods).
Mutation data, materials, and detailed experimental procedures.
We estimated these rates as the length of the tree branch from the human-chimp ancestor to the human using a normalization approach to correct for differences in local mutation rates (Materials and Methods).
The cenp-metaΔ allele is homozygous lethal at the larval stage (for further information on the nature of the cenp-metaΔ mutation, see Materials and Methods and Fig. 1A).
The basis for the screen was the isolation of sem-3 inx-9 animals that did not bloat with eggs, indicating the presence of a linked sterile or lethal mutation (see Materials and Methods).
Sanger sequences of 50 80 cDNA clones obtained from independent experiments were aligned to a yeast non-coding RNA database using both Blast and Novoalign to align the fragments to the reference sequences and Novoalign was used to locate mutations and calculate percentage of mutations (see Materials and methods).
This implies that all 44 mutant alleles/42 unique mutations (see Materials and Methods) could be genotyped accurately and thus be implemented in a clinical assay.
TS-PTDH contains 12 mutations that result in considerably increased thermostability with minimal change in activity, and four additional mutations that increase its activity (for mutations, see Materials and Methods).
