2.3. Design of real-time PCR primer and probe
A set of primers were first used for the amplificability tests
namely: TR03 50-TCTGCCCTATCAACTTTCGATGGTA-30 and TR04
50-AATTTGCGCGCCTGCTGCCTTCCTT-30 with a product size of
137 bp. These primers were used for the first time for the eukaryote
detection in the University of Berne in Switzerland (Allmann,
Candrian, Höfelein, & Lüthy, 1993). Then, a primer and probe set,
specific for S. salar L., was designed using the growth hormone
gene 1 (accession number X61938.1). The nucleotide sequences
encoding the gene selected are determined from the NCBI database
(http://www.ncbi.nlm.nih.gov/). Two major tools were applied:
Multiple sequence alignment with hierarchical clustering
(Multalin) and Basic Local Alignment Search Tool (Blast).
NetPrimer software (PREMIER Biosoft) was used to design primers.
The primers used were AM5F: 50-AAGGTGCAAAACCATGTTGCCTT
CT-30 and the AM5R 50-ATGTGAGTGTTCTAGGTCACTAGAC-30 . The
TaqMan probe was labeled on the 50 end with a fluorescent reporter
dye 6 carboxyfluorescein; FAM) and on the 30 end with a black
hole quencher-1 (BHQ1). The specificity of the primers and probe
was evaluated by BLASTN from NCBI. Syber Green was used for
specificity validation of the designed primers.