Defective in enteric muscle contraction (expulsion) step of defecation motor program and egg-laying (severe bloating-Egl Type A: serotonin and imipramine resistant). Enteric and egg-laying muscle structures are normal. Semi-dominant for Egl defect, but not for constipation defect. n2372/+ : ME3. ES3: adult heterozygotes and homozygotes.
