| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q8VBV2 | Sperm-associated antigen 11; Antimicrobial-like protein Bin-1b; | Spag11; Bin1b; | NP_659555.1; | 68 | rat |
| Q5XIC4 | Maspardin; Spastic paraplegia 21 autosomal recessive Mast syndrome protein homolog; | Spg21; | NP_001006988.1; | 261 | rat |
| Q7TT47 | Paraplegin; EC 3.4.24.-; | Spg7; | NP_852053.1; | 744 | rat |
| Q91V26 | Sphingosine kinase 1; SK 1; SPK 1; EC 2.7.1.91; | Sphk1; | NP_001257736.1;NP_001257737.1;NP_001257738.1;NP_001257739.1;NP_001257740.1;NP_596877.2;XP_006247850.1; | 383 | rat |
| Q6BDS1 | Transcription factor PU.1; | Spi1; Sfpi1; | NP_001005892.1; | 271 | rat |
| P09005 | Serine protease inhibitor 2.1; SPI-2.1; Fragment; | NULL | NULL | 214 | rat |
| Q5EBA3 | Transcription factor Spi-B; | Spib; | NP_001019457.1; | 269 | rat |
| Q5RKG1 | Spindle and centriole-associated protein 1; Coiled-coil domain-containing protein 52; | Spice1; Ccdc52; | NP_001008286.1;XP_006248393.1;XP_006248394.1; | 868 | rat |
| Q4V8J7 | Spindlin-1; Spindlin1; | Spin1; Spin; | NP_001019967.1;XP_006252597.1;XP_008769237.1; | 262 | rat |
| P0C6C0 | A-kinase anchor protein SPHKAP; SPHK1-interactor and AKAP domain-containing protein; Sphingosine kinase type 1-interacting protein; | Sphkap; Skip; | NULL | 1683 | rat |
| Q68FP5 | Snurportin-1; RNA U transporter 1; | Snupn; Rnut1; | NP_001004270.1;XP_006243187.1;XP_006243188.1;XP_006243189.1; | 358 | rat |
| Q2YDU8 | Protein spinster homolog 1; | Spns1; | NP_001034297.2; | 528 | rat |
| P35446 | Spondin-1; F-spondin; | Spon1; Sponf; | NP_742064.1; | 807 | rat |
| Q9WV75 | Spondin-2; Mindin; | Spon2; | NP_612542.1; | 330 | rat |
| Q62740 | Secreted phosphoprotein 24; Spp-24; Secreted phosphoprotein 2; | Spp2; Spp24; | NP_446029.1; | 203 | rat |
| Q5PQL3 | Signal peptide peptidase-like 2B; SPP-like 2B; SPPL2b; EC 3.4.23.-; | Sppl2b; | NP_001014222.1; | 577 | rat |
| Q63532 | Cornifin-A; Small proline-rich protein 1A; SPR1A; SPRR1; | Sprr1a; Spr Sprr1; | NULL | 152 | rat |
| P16975 | SPARC; Basement-membrane protein 40; BM-40; Osteonectin; ON; Secreted protein acidic and rich in cysteine; | Sparc; | NP_036788.1; | 301 | rat |
| Q3C2P8 | Sprouty-related, EVH1 domain-containing protein 2; Spred-2; | Spred2; | NP_001040559.1; | 410 | rat |
| P18297 | Sepiapterin reductase; SPR; EC 1.1.1.153; | Spr; | NP_062054.1; | 262 | rat |
