Transcriptome profiling of the silkworm spinneret and Filippi's gland revealed over 11000 expressed genes.
Transcripts associated with ion transport and cuticle proteins were enriched in the spinneret.
The spinneret may provide a suitable physiological and biochemical environment for the silk fiber formation.
Transcripts enriched in the Filippi's gland suggested a role in transporting small solutes to the silk gland duct.
One Filippi's gland specific gene (BGIBMGA013432) was identified as a putative transporter.