Few noncanonical proteins are confidently detected in MS data.

(A) The number of predicted proteins and decoys detected in MS data at a range of confidence thresholds among canonical yeast proteins. The dashed line signifies the 1% FDR threshold among canonical proteins. (B) The number of predicted noncanonical proteins and decoys detected in MS data at a range of confidence thresholds. (C) The number of predicted proteins and decoys detected in MS data at a range of confidence thresholds, considering noncanonical and canonical proteins together. The dashed line signifies the 1% proteome-wide FDR threshold. The data underlying this Figure can be found in S1 Data.