Users can browse the set of viral ORF clones already established in ViralORFeome by selecting the 'clones' option in the menu bar. Queries can be performed by entering criteria such as virus species, GenBank protein accession numbers or ViralORFeome clone IDs. Viral ORF clones can also be searched by nucleotide or protein BLAST. Until now, three laboratories involved in the Infection-MAPping project (I-MAP) have used ViralORFeome interface and generated a collection of 528 viral ORFs cloned into pDONR vectors. Among them, 145 have already been stored in a dedicated repository for viral ORFeome resource (ORFeotheque; Hospices Civils de Lyon), and 134 are available upon request under material transfer agreement via ViralORFeome. This set of viral ORF clones can be searched selecting the 'ORFeotheque' option in the menu bar.