| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| P38957 | Suppressor of hydroxyurea sensitivity protein 2; | SHU2; YDR078C; | NP_010363.1; | 223 | yeast |
| P53266 | Cytochrome oxidase assembly protein SHY1; SURF1 homolog of Yeast; SURF1-like protein; | SHY1; YGR112W; | NP_011627.1; | 389 | yeast |
| Q12212 | Protein SIA1; | SIA1; YOR137C; | NP_014780.3; | 622 | yeast |
| P38634 | Protein SIC1; CDK inhibitor p40; | SIC1; SDB25; YLR079W; | NP_013180.1; | 284 | yeast |
| P38262 | SIR4-interacting protein SIF2; | SIF2; EMB1; YBR103W; | NP_009661.1; | 535 | yeast |
| Q08199 | Nucleotide exchange factor SIL1; Protein SLS1; | SIL1; PER100 SLS1; YOL031C; | NP_014611.1; | 421 | yeast |
| P40472 | Probable secreted beta-glucosidase SIM1; EC 3.2.1.-; | SIM1; PBP3; YIL123W; | NP_012143.2; | 476 | yeast |
| P22579 | Transcriptional regulatory protein SIN3; | SIN3; CPE1 GAM2 RPD1 SDI1 SDS16 UME4; YOL004W; | NP_014639.1; | 1536 | yeast |
| P50263 | Protein SIP18; | SIP18; YMR175W; | NP_013900.1; | 79 | yeast |
| P32578 | SNF1 protein kinase subunit beta-1; SNF1-interacting protein 1; | SIP1; YDR422C; | NP_010710.4; | 815 | yeast |
| P34164 | SNF1 protein kinase subunit beta-2; Protein SPM2; SNF1-interacting protein 2; | SIP2; SPM2; YGL208W; | NP_011307.1; | 415 | yeast |
| P38717 | Protein SIP3; | SIP3; YNL257C; | NP_014142.1; | 1229 | yeast |
| P46954 | Protein SIP4; | SIP4; YJL089W; | NP_012446.1; | 829 | yeast |
| P40210 | Protein SIP5; SNF1-interacting protein 5; | SIP5; YMR140W; | NP_013860.1; | 489 | yeast |
| P21691 | Regulatory protein SIR1; Heterochromatin protein SIR1; Silent information regulator 1; | SIR1; YKR101W; | NP_013027.4; | 654 | yeast |
| P06700 | NAD-dependent histone deacetylase SIR2; EC 3.5.1.-; Regulatory protein SIR2; Silent information regulator 2; | SIR2; MAR1; YDL042C; | NP_010242.1; | 562 | yeast |
| P06701 | Regulatory protein SIR3; Silent information regulator 3; | SIR3; CMT1 MAR2 STE8; YLR442C; | NP_013547.3; | 978 | yeast |
| P11978 | Regulatory protein SIR4; Silent information regulator 4; | SIR4; ASD1 STE9 UTH2; YDR227W; | NP_010513.1; | 1358 | yeast |
| P25294 | Protein SIS1; | SIS1; YNL007C; | NP_014391.1; | 352 | yeast |
| P36024 | Phosphopantothenoylcysteine decarboxylase subunit SIS2; Halotolerance protein HAL3; Sit4 suppressor 2; | SIS2; HAL3; YKR072C; | NP_012998.1; | 562 | yeast |
