Table 1.

 Lactase activity, L/S ratio, and allelic ratio of the study subjects

Age (y)	C/T−13910 genotype	Lactase activity (U/g protein)	L/S ratio	Allele ratio (%) C/T−13910*
0.8	CT	85	1.11	48/52
1.1	CT	113	1.02	52/48
4.0	CT	31	0.49	48/52
4.3	CT	53	0.48	42/58
4.7	CT	40	0.62	40/60
4.9	CT	–	–	42/59
5.1	CT	6	0.08	48/52†
6.7	CT	22	0.28	18/82
7.6	CT	–	–	16/84
11.1	CT	29	0.54	13/87
14.9	CT	21	0.40	17/83
17.0	CT	29	0.62	24/76
1.1	CC	–	–	52/48
5.0	CC	24	0.28	51/49
22.8	CC	6	0.08	49/51

*Defined by assessing cSNP G/A₊₅₉₃ in exon 1 of the lactase LCT gene.

†Carrier of a CLD mutation (unpublished data).