TissueDirect Multiplex PCR system. TissueDirectTM Multiplex PCR System is a powerful reagent kit for both easy and rapid genomic DNA preparation and multiplex PCR amplification. Genomic DNA is directly released from cells (tissues, mouse tails, hair shafts, cell culture using proprietary reagents in 12 minutes without DNA isolation. The genomic DNA can be used immediately in PCR amplification of multiple gene targets (up to >1,000) or stored at + 4 °C for future use. More ...