TERC and dyskeratosis congenita: Comparing telomere lengths of individuals with 5p– syndrome to the telomere lengths in individuals with autosomal dominant DC due to a TERC gene deletion, we find that individuals with 5p– have much longer telomeres than individuals with autosomal dominant DC and a TERC gene deletion, both by flow cytometry FISH and by Southern blotting (see Fig. 3A,B).