Different attenuated phenotypes of GM2 gangliosidosis variant B in Japanese patients with HEXA mutations at codon 499, and five novel mutations responsible for infantile acute form.

Abstract excerpt

Eight mutations of the alpha subunit of beta-hexosaminidase A gene ( HEXA) were identified in eight patients with GM2 gangliosidosis variant B. They were five missense mutations, two splice-site mutations, and one two-base deletion. Five of them, R252L (CGT-->CTT), N295S (AAT-->AAC), W420C (TGG-->TGT), IVS 13, +2A-->C, and del 265-266AC (exon 2), were novel mutations responsible for infantile acute form of GM2...

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