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Table 2 A glossary of key terms, their abbreviations and formulae.

From: Improved results in proteomics by use of local and peptide-class specific false discovery rates

Measurement

Formula

Description

Corroborating (c) hits

 

Correct assignments matching together with others to a protein

Non-corroborating (nc) hits

 

Correct assignments matching singly to a protein

FDR (global FDR)

estimated by

Fraction of incorrect assignments above the score threshold

Local FDR

FDR for peptides with score (S):

Fraction of incorrect assignments within a score window

CNC Local FDR

 

Fraction of incorrect assignments within a score window, separately for assignments matching together with others (c) or singly (nc) to a protein