MDA phi 29 Kit contains phi29 DNA Polymerase, that catalyzes a highly processive DNA synthesis (up to 70,000 base insertions per binding event) coupled to strand displacement activity(1). It possesses an inherent 3’-5’ exonuclease activity(2) acting preferentially on single-stranded DNA. The kit is designed to perform MDA (multiple displacement amplification) reactions. The Modified Random Hexamer Primers included in the kit are protected against degradation by the 3’-5’ exonuclease activity of the phi 29 DNA Polymerase.