| Protein | Gene Symbol | All allelic disease phenotypes - locus/disease symbols | 
| Bag cochaperone |  |  * Dilated cardiomyopathy, 2F - CMD2F (10.86) 
 | 
BCL2-associated athanogene 3 |  | * myofibrillar myopathy with bag3 defect -  (5.7, 10.71, 14.75)* Charcot-Marie-Tooth disease, axonal, related to BAG3 -  (5.7, 10.71, 14.75)
 
  * Dilated cardiomyopathy related to BAG3 - CMD1HH (5.7, 10.71, 14.75) 
 | Beta sarcoglycan |  |  * Muscular dystrophy, limb-girdle, type 2E - LGMD2E (1.27) 
 | Beta-1,3-N-acetylgalacto-saminyltransferase 2 |  |  * Congenital muscular dystrophy with hypoglycosylation of dystroglycan WWWS/MEB li - MDDGA11 (2.29) 
 | Beta-1,4-N-acetyl-galactosaminyl transferase 1 |  | * Charcot-Marie-Tooth disease, axonal -  (14.100, 15.36)
  * Spastic paraplegia 26 - SPG26 (14.100, 15.36) 
 | Bicaudal D homolog 2 (Drosophila) |  | * Arthrogryposis and BICD2-related neuromuscular disease -  (12.42, 12.43, 17.24)
  * Spinal muscular atrophy, lower extremity, autosomal dominant 2 - SMALED2A (12.42, 12.43, 17.24) 
  * Spinal muscular atrophy, lower extremity-predominant, autosomal dominant 2B - SMALED2B (12.42, 12.43, 17.24) 
 | Blood vessel epicardial substance |  |  * Limb-Girdle, Muscular dystrophy, type 2X - LGMD2X (1.38) 
 | Brain expressed, associated with Nedd42 |  |  * spinocerebellar ataxia-31 - SCA31 (13.28) 
 |