Abstract: The distribution of transferrin phenotypes in the population of Guangdong, China, was investigated by isoelectric focusing on polyacrylamide gel. In our Samples (n=258), the frequencies of five phenotypes were as follows: TfC1C1=56.20%, TfC2C1=31.39%, TfC2C2=5.43%, TfC1D=5.43% and TfC1B=1.55%. The allele frequencies were calculated: TFC1=0.7539, TFC2=0.2112, TfD=0.0271 and TfB=0.0078. The observed and expected phenotypes provided a good fit to Hardy-Weinberg equelibrium. The analysis of 6 mother-child pairs was in agreement with Mendelian inheritance. The phenotypes of TfC1C1, TfC2C1 and TfC2C2 were compared to those found in other populations. Based on the data, the probability of excluding pater-ity and disciminating power (DP) were 0.1803 and 0.5795, respectely. The Tf phenotypes of bloodstains can be possibly typed at 4℃ for uP to four weeks, 11°—17° for up to five days and 37℃ for up to two days.