Immunogen sequence: DTIKHPGGAG AEESELQAYI AQCQDSPTSG KFRRGSGSAC SLLCCCGRDP SE. Defects in Mucolipin-1 are the cause of mucolipidosis type IV (MLIV), also known as sialolipidosis. MLIV is an autosomal recessive lysosomal storage disorder characterized by