Polymerase chain reaction, or PCR, is a laboratory technique used to make multiple copies of a segment of DNA. PCR is very precise and can be used to amplify, or copy, a specific DNA target from a ...

1| Combine the following components of the master mix on ice and mix thoroughly: 10× KLA reaction buffer (pH 9.2): 500 mM Tris base, 160 mM (NH 4) 2 SO 4, 25 mM MgCl 2, 1% Tween 20. Note ...

View Full Profile. Learn about our Editorial Policies. Polymerase chain reaction (PCR) is a fundamental molecular biology tool that scientists use to amplify and analyze genetic material, such as DNA ...

Forensic DNA profiling uses polymerase chain reaction (PCR) to amplify short tandem repeats (STRs), which are highly variable DNA regions, typically with four repeating bases. This variability helps ...