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Submit a Sequence to the archived version of PSORT-B (v.1.1.2)

Important: This is NOT the current version of PSORT-B. The current version can be found here. We are maintaining this first release as a service to our users, but we encourage all users to upgrade to the latest version of the program.

This version only supports Gram-negative proteins. For Gram-positive proteins, please use PSORT-B v.2.0.

Archived PSORT-B v.1.1.2 results for 77 Gram-negative sequenced genomes are available here.

The source code for PSORT-B v.1.1.2 is available here and documentation for v.1.1.2 is located here.


Copy and paste your Gram-negative FASTA sequences below


or upload from file:
Output format:



If you use this version of PSORT-B in your research, we would greatly appreciate if you cited the following publication:

Jennifer L. Gardy, Cory Spencer, Ke Wang, Martin Ester, Gabor E. Tusnady, Istvan Simon, Sujun Hua, Katalin deFays, Christophe Lambert, Kenta Nakai and Fiona S.L. Brinkman (2003) PSORT-B: improving protein subcellular localization prediction for Gram-negative bacteria, Nucleic Acids Research 31(13):3613-17