No alteration has been detected in the coding region.
Mutant wings typically have a crease lengthwise and have extra sensory bristles.
Homozygous mutants frequently hold out only one wing out and rarely show other wing phenotypes. tx1/Df animals have strongly outheld wings that are thickened, slightly cupped and occasionally blistered.
Wings held out at about 75o from body axis, often arched or wavy, somewhat narrow and dusky. Unable to fly because of shape and posture of wings. RK2.
A series of complementation tests between tx1 and several alleles of dei indicate that dei is allelic to tx.
Collins, 30th Oct. 1924.