Abstract: The present invention relates to a mutant of human ?-N-acetylglucosaminidase (hNAGLU), more specifically a hNAGLU mutant produced by adding a mutation to an amino acid sequence for hNAGLU such that an expression level of hNAGLU in a host cell in which a gene encoding hNAGLU is introduced can be increased compared with the case where a gene encoding wild-type hNAGLU is introduced. For example, the hNAGLU mutant has an amino acid sequence represented by SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 15, or SEQ ID NO: 19, or has an amino acid sequence introduced a mutation to the amino acid sequence of any one of the hNAGLU mutants.

Abstract: Mobile terminal device and method for switching inputs methods. In an embodiment, a mobile terminal device switches between two or more different input methods upon satisfaction of a switching condition, which indicates that input detection via the current input mode is difficult.

Abstract: A mobile terminal device includes: a first operation receiving module configured to receive a first input operation; a second operation receiving module configured to receive a second input operation having a method different from that of the first input operation; a determination module configured to determine whether or not a switch condition is satisfied which indicates that the reception of the first input operation by the first operation receiving module is difficult; and a switch control module configured to, based on the determination that the switch condition is satisfied by the determination module, switch a first mode of receiving the first input operation with the first operation receiving module to a second mode of receiving the second input operation with the second operation receiving module.