Fragment containing the ninaE gene, in which a premature stop codon replaces amino acid residue L309 and a 206bp deletion removes all coding information downstream of the introduced stop codon, but leaves the endogenous termination and all downstream mRNA processing signals intact.
Rhabdomeres are larger than in ninaE309UGA flies.
Shows lower photoreceptor R1-R6 activity than ninaE309UAA, ninaE309UAG or ninaE309UGA in an electrophysiological assay.