The oligonucleotide primer having the 5’\|GCCGGTTATGGC AGCACGCTGACC\|3’ was synthesized,which encodes a main repetition motif of protein produced by the inaZ gene.PCR of the primer in the DNA of INA - and INA + bacteria and fungi was done.All of the DNA of INA - and INA + bacteria and fungi expressed bands,the results show that the primer did not work for distinguishing the INA - and INA + organisms and for identification of the ice nucleation activity of the INA organisms by the size and brightness of the PCR products.
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