- Sperm Flagellar Protein 1 (SPEF1)
- Sperm Flagellar Protein 2 (SPEF2)
- Spen Homolog, Transcriptional Regulator (SPEN)
- Spleen Focus Forming Virus Proviral Integration Oncogene (SPI1)
- Spi-B Transcription Factor (SPIB)
- Serine Peptidase Inhibitor Like, With Kunitz And WAP Domains 1 (SPINLW1)
- Testican 1 (TIC1)
- Testican 2 (TIC2)
- Speckle Type POZ Protein (SPOP)
- Signal Peptide Peptidase Like 2A (SPPL2A)
- Signal Peptide Peptidase Like 2B (SPPL2B)
- Sprouty Homolog 4 (SPRY4)
- SplA/Ryanodine Receptor Domain And SOCS Box Containing Protein 1 (SPSB1)
- SNF2 Related CREBBP Activator Protein (SRCAP)
- Steroid 5 Alpha Reductase 3 (SRD5a3)
