P{GawB} insertion 363 bp into first exon of Cka transcript RA; approximately 100 bp into first intron of Cka transcript RD; 271 bp 5' of Cka transcript RC; approximately 300 bp into first intron of Cka transcript RB.
Flies show an aberrant gravitaxic response in a vertical gravitaxic maze assay, and show wild type behaviour in a horizontal maze. Male courtship activity is comparable to wild type, and flight is not seriously impaired.