In this regard parameters that affect desorption speed, beam spreading, ion flight times, sensitivity, signal-to-noise, ion fragmentation, sample carry-over, and instrument contamination are examined and experimental results are provided.
Fragmentation of samples B and C was more severe than that of sample A. The nanoindentation and particle strength tests proved that hardness and mechanical strength are the dominant factors of attrition resistances.
Based on the degree of DNA fragmentation, FFPE samples can be distinguished into those with relatively well preserved DNA (favorable samples, roughly ¾ of our diagnostic cases) and those with very fragmented DNA (unfavorable samples, ¼ of our diagnostic cases).
Overall total coverage of a sample after sequencing would be expected to be inversely associated with the amount of fragmentation whereby samples with high level of DNA fragmentation would have less amplification and therefore associated with lower coverage.
After 24 h the swollen gels were weighed and dried to constant weight at 60 °C (to recheck its weight due to the possible fragmentation of samples with very low mechanical stability).
After the fragmentation, the samples were placed on ice.
Following fragmentation the samples were dried down completely in a speed-vac.
After genome-wide amplification of 4 μl of bisulfite-treated DNA and enzymatic fragmentation, the samples will be added to the chip.
Filament severing by proteins such as cofilin or filament fragmentation during sample preparation may generate short filaments out of longer ones.
Sampling in the middle portion of the 3N1 range is somewhat sparse in comparison to more eastern and western areas, and this may be partially responsible for an inference of fragmentation; more sampling in the region may reveal intermediate haplotypes and more continuity between east and west.
