Preliminary study on the loss of heterozygosity at 17p13 in gastric and colorectal cancers

Table 1 Loss of heterozygosity (LOH) detected by the php53B and pYNZ22 probes in gastric cancer

Locus	Restriction enzyme	Number of sample	Heterozygosity and rate (%)	LOH and rate (%)
p53	Sca I	22	3 (14)1	2 (66)1
YNZ22	Taq I	8	4 (50)	2 (50)
	Msp I	14	6 (43)1	3 (50)1
17p13		22	12 (54)	6 (50)

¹One sample showed heterozygosity and LOH detected with both probes.

Table 2 Loss of heterozygosity (LOH) detected by the php53B and pYNZ22 probes in colorectal cancer

Locus	Restriction enzyme	Number of sample	Heterozygosity and rate (%)	LOH and rate (%)
p53	Sca I	7	2 (20)	1 (50)
YNZ22	Msp I	14	8 (57)	5 (62)
17p13		14	10 (71)	6 (60)

The number in bracket shows the rate of heterozygosity or LOH.