| Identifier | Protein names | Gene names | Cross reference refseq | Length | Species |
| Q71LX6 | Xin actin-binding repeat-containing protein 2; Beta-xin; Cardiomyopathy-associated protein 3; L-NAME-induced actin cytoskeletal protein; | Xirp2; Cmya3 Xin2; | NP_973718.1; | 3302 | rat |
| Q5GH60 | XK-related protein 2; X Kell blood group-related, X-linked; | Xkrx; Xkr2 Xrg2; | NP_001012230.1; | 448 | rat |
| Q5GH59 | XK-related protein 4; | Xkr4; Xrg4; | NP_001011971.1; | 647 | rat |
| Q5GH57 | XK-related protein 6; | Xkr6; Xrg6; | NP_001012042.1; | 638 | rat |
| Q5GH56 | XK-related protein 7; | Xkr7; Xrg7; | NP_001012092.1;XP_008760556.1; | 580 | rat |
| Q5GH61 | Membrane transport protein XK; XK homolog; XK-related protein 1; | Xk; Xkh Xkr1 Xrg1; | NP_001012227.1; | 445 | rat |
| Q80U96 | Exportin-1; Exp1; Chromosome region maintenance 1 protein homolog; | Xpo1; Crm1; | NP_445942.1;XP_006251640.1; | 1071 | rat |
| O54975 | Xaa-Pro aminopeptidase 1; EC 3.4.11.9; Aminoacylproline aminopeptidase; Cytosolic aminopeptidase P; Soluble aminopeptidase P; sAmp; X-Pro aminopeptidase 1; X-prolyl aminopeptidase 1, soluble; [Cleaved into: Xaa-Pro aminopeptidase 1, N-terminally processed癷?癸 | Xpnpep1; App; | NP_571988.1; | 623 | rat |
| B5DEQ3 | Probable Xaa-Pro aminopeptidase 3; X-Pro aminopeptidase 3; EC 3.4.11.9; Aminopeptidase P3; APP3; | Xpnpep3; | NP_001124054.2; | 506 | rat |
| Q9ESZ0 | DNA repair protein XRCC1; X-ray repair cross-complementing protein 1; | Xrcc1; Xrcc-1; | NP_445887.1; | 631 | rat |
| Q3MIF4 | Xylulose kinase; Xylulokinase; EC 2.7.1.17; | Xylb; | NP_001028876.1; | 536 | rat |
| Q9EPI1 | Xylosyltransferase 1; EC 2.4.2.26; Peptide O-xylosyltransferase 1; Xylosyltransferase I; Fragment; | Xylt1; | NULL | 821 | rat |
| Q9EPI0 | Xylosyltransferase 2; EC 2.4.2.26; Peptide O-xylosyltransferase 2; Xylosyltransferase II; | Xylt2; | NULL | 864 | rat |
| Q2EJA0 | Transcriptional coactivator YAP1; Yes-associated protein 1; Protein yorkie homolog; Yes-associated protein YAP65 homolog; | Yap1; Yap Yap65; | NP_001029174.2;XP_006242555.1; | 469 | rat |
| P62961 | Nuclease-sensitive element-binding protein 1; CCAAT-binding transcription factor I subunit A; CBF-A; DNA-binding protein B; DBPB; Enhancer factor I subunit A; EFI-A; Y-box transcription factor; Y-box-binding protein 1; YB-1; | Ybx1; Msy-1 Nsep1 Yb1; | NP_113751.3; | 322 | rat |
| Q62764 | Y-box-binding protein 3; Cold shock domain-containing protein A; DNA-binding protein A; Muscle Y-box protein YB2; RYB-A; Y-box-binding protein A; | Ybx3; Csda Dbpa Yb2; | NP_114185.3; | 361 | rat |
| F1LM93 | Tyrosine-protein kinase Yes; EC 2.7.10.2; p61-Yes; | Yes1; | NULL | 541 | rat |
| Q6PEC3 | Protein YIF1B; YIP1-interacting factor homolog B; | Yif1b; | NP_001014810.1;NP_942029.2; | 259 | rat |
| Q6P6G5 | Protein YIPF1; YIP1 family member 1; | Yipf1; | NP_955415.1; | 306 | rat |
| Q5XIT3 | Protein YIPF2; YIP1 family member 2; | Yipf2; | NP_001014230.1; | 311 | rat |
