Box Plot and Quality Control

Box Plot and Quality Control

Figure 3

a) Box plot for each channel

Figure 3(a) displays box plots for the channel intensity distributions of all labels in the experiment. The horizontal dashed line represents the set reporter ion intensity threshold. A plot displaying the average distribution for all labels is also included. This will talk about Box plot and quality control.

b) Accumulation Curve for Quality

Figure 3(b) displays a plot comparing the number of PSMs that correspond to each peptide quality score. This plot provides a guideline in helping the user set an appropriate quality score threshold. It is recommended to set this threshold at the point in which the number of PSMs begins to dramatically drop.

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Box plot and quality control