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. 2019 Nov 4;48(D1):D992–D1005. doi: 10.1093/nar/gkz999

Table 4.

Assay types and activity thresholds used for activity tag determination: only concentration based assays were used to determine activity tags. Activities reporting less than the maximum admitted value for positives were considered active (+) interactions, while those greater than the ‘minimum admitted value for negatives’ were considered inactive (−). Any activity reported in between these two values was considered as indeterminate (0)

Assay
type
Standard
unit
Maximum admitted value for actives Minimum admitted value for inactives
AC50 nM 20000 100000
EC50 nM 20000 100000
IC50 nM 20000 100000
IC50 ug ml−1 15 50
K d nM 20000 100000
K i nM 20000 100000
Potency nM 20000 100000