T4 Gene 32 Protein is reported to improve the yield of long PCR products when 0.5 to 1.0 nmol of the protein is included in the reaction. T4 Gene 32 Protein is also reported to increase the yield of PCR products amplified from samples that contain humic acid. The inhibitory effect of humic acid is reduced by a factor of 7 when T4 Gene 32 Protein is included in the PCR (at a concentration of 2.5 μg/100 μl).
The protein is isolated from the triple-mutant T4amN134/ amBL292/ amE 219 defective for the T4 genes 33, 35, and 58 to 61.