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probeBase is a curated database of rRNA-targeted oligonucleotide probes and primers.

Search probeBase for target organisms, probe names, primers, target sites, references, etc.  

Match rRNA sequence(s) against probeBase and find all published probes targeting your sequence(s).  

Match partial rRNA sequence(s) against full-length sequences in SILVA and find published probes potentially targeting your sequence(s).

View lists of probes (according to probe categories), primers, microarrays, references, etc.  

The form for submitting new probes or primers is currently disabled and will become available again shortly.

Websites relevant to ribosomal RNA  

Credits and acknowledgements

This is a completely new implementation of probeBase including a new database architecture and environment to accommodate computationally efficient access and improved search and sequence match functions. The previous version of probeBase is still available at

If you use probeBase please cite:
Greuter D, Loy A, Horn M, Rattei T. 2016. probeBase—an online resource for rRNA-targeted oligonucleotide probes and primers: new features 2016. Nucleic Acids Res. 10.1093/nar/gkv1232 Full text