Methods Time (h) Cost ($) Allmag™ Blood Genomic DNA kit 0.5 1.0 MiniBEST Bacterial Genomic DNA Extraction kit 2.0 1.9 Phenol-chloroform method 4.0 <0.5 Boiling lysis method 0.15 <0.17

Table 3: Time and cost comparisons among four DNA isolation methods.