lacZ expression governed by altered Antp P2 promoter: Ubx and abd-A protected sequences at the following positions relative to the P2 promoter mutated by site directed mutagenesis: 1997, 1957, 1952, 1921, 1918, 1076, 958, 925, 837, 744, 719, 555, 542, 452, 445, 422.