Fig. 6.
Optimization of quantitative polymerase chain reaction (PCR) analysis.
Autoradiograph showing PCR carried out with an increasing number of cycles and with the products subjected to Southern hybridization with a gene-specific probe. The optimal cycle number was determined to be in the midlinear region of the curve: 31 cycles for TPO transcripts (A) and 18 cycles for GAPDH (B).