Distribution of the Pi, TfC, and Gc subtypes in Galicia (North West Spain)

Alpha 1-antitrypsin (Pi), Gc, and TfC subtypes were determined by isoelectric focusing in thin layer agarose (AGIF) and polyacrylamide gels (PAGIF) in a total of 480 individuals from Galicia. The following gene frequencies were observed: for Pi:PiM1:0.660; PiM2:0.115; PiM3:0.060; PiS:0.149; PiZ:0.009; PiF:0.005; PiI:0.001; for Gc:Gc1S:0.572; Gc1F:0.120; Gc2:0.308; for TfC: TfC1:0.778; TfC2:0.180; TfC3:0.041; TfC6:0.001. A rare variant TfC6-2 was found and the intrafamilial distribution of the TfC6 allele studied. The use of these systems for forensic purposes and the peculiar distribution of some of their alleles in the Galician population are discussed.