Lam^G262 escapers are slower to right themselves than controls. Heterozygous adults are indistinguishable from controls.

Lam^G262 homozygote escapers performed negative gravitaxis (climbing upwards) significantly less well than Lam^G262 heterozygotes. Homozygotes do not show any decrease beyond their initial low levels of negative gravitaxis over their 2 week survival period. The fraction of homozygous mutants that perform negative gravitaxis decreases over time and is always lower than age-matched controls. The decrease is much more dramatic for mutant flies, approaching zero at two weeks of age.

Lam^G262 homozygous and heterozygous mutants exhibit lower pupariation height, indicative of reduced larval locomotion and negative gravitaxis.

Lam^G262 mutant adult escapers do not exhibit great changes in muscle bulk, placement, or organisation. Muscle 5 in the larval abdominal body wall is often absent or slightly reduced in size and mis-inserted. In addition, fine structure defects in fibrillar organisation are also found in Lam^G262 larvae that are never observed in age-matched control larvae.