Quantitative analysis of various PCDH11 X/Y gene transcripts Kung Ahn 1, Jae-Won Huh 1, Dae-Soo Kim 2, and Heui-Soo Kim 1,2 1 Division of Biological Sciences, College of Natural Sciences, Pusan National University 2 PBBRC, Interdisciplinary Research Program of Bioinformatics, College of Natural Sciences, Pusan National University References Genome Information Lab Introduction Primer Design Twenty Different Human tissue cDNAs Quantitative Analysis Experimental Procedure Real-time RT PCR using SYBR Green I Materials & Methods Extension(II) phase Extension(I) phase End of PCR cycle Annealing phase SYBR Green I Detection of fluorescence Results & Discussion Transcripts structures of the PCDHX/Y Standard curve and melt curve in AJ Expression pattern in various tissues Abstract Protocadherins are members of the cadherin superfamily that involved in cell-cell interactions in the development of the central nervous system. PCDHX/Y genes were known to be composed of at least six exons sharing 98.1% identity. PCDHY is located on the Y chromosome and originates from a translocation of the PCDHX gene after the divergence between chimpanzees and humans PCDH11 genes. All of PCDH11 gene related transcripts were collected and analyzed using bioinformatic analysis. From the EST and mRNA sequence analysis, we could reconstruct the seven different alternative transcripts of PCDH11X. Specific elements of insertion and deletion were identified by the multiple alignment analysis. Those elements were used for the amplification of individual transcripts. Specific amplification of individual primer sequences was confirmed by the analysis of melting curve. Absolute quantification real-time RT-PCR amplification was applied to compare seven different transcript level of PCDH11X gene. One of the transcripts shows the dominant expression pattern which seems to be the indication of major roles among the seven different transcripts. Taken together, we suggest that the application of real-time RT-PCR approach could be an advantageous method for the investigation of closely related alternative transcripts. One of the transcripts shows the dominant expression pattern which seems to be the indication of major roles among the seven different transcripts. [1] Wilson ND, Ross LJN, Crow TJ, Volpi EV : PCDH11 is X/Y homologous in Homo sapiens but not in Gorilla gorilla and Pan troglodytes. [2] Stuart N. Peirson, Jason N. Butler and Russell G. Foster : Experimental validation of novel and conventional approaches to quantitative real-time PCR data analysis. PCDHY is located on the Y chromosome and originates from a translocation of the PCDHX gene after the divergence between chimpanzees and humans Evolutionary changes in the genes transcribed from the X/Y homology region in humans were proposed to be causally linked to language acquisition and functional brain asymmetry, two hominid-specific features that are absent from the brains of even our closest relatives, chimpanzees.