- Serine Palmitoyltransferase, Long Chain Base Subunit 3 (SPTLC3)
- Serine Palmitoyltransferase, Long Chain Base Subunit 2 (SPTLC2)
- Serine Palmitoyltransferase, Long Chain Base Subunit 1 (SPTLC1)
- Sepiapterin Reductase (SPR)
- Secreted Phosphoprotein 2 (SPP2)
- Serine Peptidase Inhibitor Kunitz Type 1 (SPINT1)
- Serine Peptidase Inhibitor Kunitz Type 2 (SPINT2)
- Serine Peptidase Inhibitor Kazal Type 1 (SPINK1)
- Serine Peptidase Inhibitor Kazal Type 2 (SPINK2)
- Serine Peptidase Inhibitor Kazal Type 5 (SPINK5)
- Spinster Homolog 1 (SPNS1)
- Sperm Equatorial Segment Protein 1 (SPESP1)
- Spermatogenesis Associated Protein 4 (SPATA4)
- Spermatogenesis Associated Protein 2 (SPATA2)
- Laminin Beta 1 (LAMb1)
