Patent ID: 7026159

Claim:
A purified nucleic acid segment encoding HA synthase, wherein the segment: (a) encodes the HA synthase of SEQ ID NO:2; or (b) is capable of hybridizing to the complement of nucleotides 1–1449 of the nucleotide sequence of SEQ ID NO:1 under standard hybridization conditions selected from the group consisting of: (i) a temperature of about 37° C. in a hybridization mixture comprising NaCl at a concentration in a range of from about 0.5 M to about 1.5 M, a divalent cation chelator at a concentration in a range of from about 0.05 mM to about 0.5 mM, and a buffering agent at a concentration in a range of from about 10 mM to about 100 mM and having a pH of about 7.2; and (ii) a temperature of about 65° C. in a hybridization mixture comprising NaCl at a concentration in a range of from about 0.3 M to about 0.6 M, a divalent cation chelator at a concentration in a range of from about 0.05 mM to about 0.5 mM, and a buffering agent at a concentration in a range of from about 10 mM to about 100 mM and having a H of about 7.2.