| abstract |
It is intended to find out a substance having an improved function of modifying the taste sensation, determine the structure of this taste sensation-modifying substance, clarify its structure at the gene level too, thus determine the primary structure of the substance, obtain a gene encoding the same and provide a taste sensation-modifying composition characterized by containing the above taste sensation-modifying substance. Namely, a polypeptide NAS specified by the following (A) or (B), and a dimer protein Neocrin characterized by comprising the polypeptide NAS and another polypeptide NBS and having an activity of modifying the taste sensation. (A) A polypeptide comprising the amino acid sequence represented by SEW ID NO:2 in Sequence Listing. (B) A polypeptide comprising an amino acid sequence derived from the amino acid sequence represented by SEW ID NO:2 in Sequence Listing by substitution, deletion, insertion, addition or inversion of one to several amino acids and being capable of forming, together with the polypeptide NBS, a dimer Neocrin having an activity of modifying the taste sensation. |