Protein Interaction Analytics System

Protein Frequency Library


Open Resource

The Protein Frequency Library tool is available to any user. You do not require an account to utilize it.

Howvwer you may also register to recieve updates with regards to PepTracker by email.
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What does the Protein Frequency Library do?

Protein Interactions

Provides a method of discriminating between specific and nonspecific protein interactions

Datset Normalisation

Within an immunoprecipitation experiment, it is expected that non-specific interaction partners should not change between conditions. Hence, these proteins can be used as a basline to normalise a dataset.

Dynamic Filters

The PFL is dynamic and, therefore, can be filtered using a defined set of experimental conditions to obtain more refined frequency annotations.


Search the multidimensional structure for specific proteins of interest.

Data Warehouse

The PFL is powered by a Data Warehouse which allows multidimensional analysis of the data involved.


Look at our publication for a more detailed explanation of the Protein Frequency Library.

Boulon & Ahmad et al. (2009)
Establishment of a protein frequency library and its application in the reliable identification of specific protein interaction partners. Molecular & Cellular Proteomics.