Expression is observed in the nucleus and in the nucleolus in spermatocytes and in round spermatids.
tplus3bEGFP is a suppressor of male sterile phenotype of tplus3aΔ, tplus3bΔ
tplus3aΔ, tplus3bΔ double homozygotes are male sterile; this phenotype is rescued by tplus3bEGFP.