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ABI prism 7900HT Sequence Detection System

Roche LightCycler® 480 II Real-time PCR is most commonly used to quantify DNA or cDNA templates by monitoring the DNA amplification rate at each cycle of PCR, so it is also called quantitative PCR (qPCR).  Real-time PCR is also capable of performing qualitative analysis for genetic variation.

Platform Service

Two systems, Roche LightCycler® 480 II (LC480 II) and ABI 7900HT Fast (7900HT), are available at our centre for performing qPCR runs and they have different excitation spectra and detection channels.

  Roche LC480 II ABI 7900HT
Excitation wavelengths (nm)
440, 465, 498, 533, 618 488
Detection wavelengths (nm)
488, 510, 580, 610, 640, 660 500-660
Compatible Dyes
SYBR Green I, Fluorescein (FITC), FAM, HEX (VIC),
Cy5, ResoLight, LightCycler® Cyan500,
LightCycler® Red610, LightCycler® 640
SYBR® Green Dye I, FAM™, VIC™,

Due to the differences in specifications, the applications of the systems are slightly different.

Application LC480 II 7900HT
Gene Expression
       Absolute Quantitation (AQ)

       Relative Quantitation (RQ)

Genetic Variation
        Endpoint Assay

        Melting Curve Assay

        High-Resolution Melting (HRM)


The most current manuals and application notes can be found on the websites of AppliedBiosystem and Roche.