Patent ID: 7375201

Claim:
An isolated DNA of any one of the following: (a) DNA which encodes the amino acid sequence shown in SEQ ID NO: 1; (b) DNA which encodes an amino acid sequence comprising a deletion, substitution and/or addition of one to five amino acids with respect to the amino acid sequence shown in SEQ ID NO: 1, and which encodes a fluorescent protein; (c) DNA comprising a nucleotide sequence shown in SEQ ID NO: 2; or (d) DNA comprising a nucleotide sequence comprising a deletion, substitution and/or addition of one to fifteen nucleotides with respect to the nucleotide sequence shown in SEQ ID NO: 2, and encoding a fluorescent protein; wherein the fluorescent protein has an excitation maximum wavelength between 391-507 nm and a fluorescence maximum wavelength between 505-514 nm.