The Thai Journal of Veterinary Medicine


piRNAs are a testis-specific class of small RNAs in mammal. Sixteen sequences of piRNAs were cloned fromthree different species by the method of construction of cDNA library including two sequences from mouse, eightsequences from quail and six sequences from chicken. Herein, the two piRNAs sequences from mouse had alreadybeen identified, while the others were cloned for the first time. The sequence analysis indicated that the avian piRNAshad a similar length and a preference of uridine for 5’-end with varying degrees to the mammalian piRNAs. Besidethe function in the process of sperm development and maturation, avian piRNAs may also have a role in regulatingthe development of nerve and tumor cells.

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