Functional annotation clustering of differentially expressed genes in mated queen spermatheca vs. drone semen using the online tool DAVID [50,51].

Recognized gene clusters were identified using the lowest stringency of the software's Functional Annotation Clustering settings. The reported genes are those that were clustered and had an FDR value S5 Table for a complete list of all the genes that were differentially expressed between mated honey bee queen spermatheca and drone semen. (XLSX)