Fig. 1
tertsa6541/sa6541 fish age prematurely.
(A) Protein domain structure of zebrafish Tert. Depicted in yellow is the telomerase ribonucleoprotein complex RNA-binding domain (RBD), and in purple the reverse transcriptase domain (RTD). The position of three known alleles are shown. (B) tertsa6541/sa6541 fish age prematurely. Homozygous fish display a wasting phenotype. Scale bar: 10mm. (C) tertsa6541/sa6541 fish die prematurely compared to their siblings (n=92 homozygotes, n=92 heterozygotes, n=92 wild-types). (D) Photograph of capillaries containing sperm from wild-type sibling males (left) and clear fluid containing no sperm from tertsa6541/sa6541 males (right). (E) Homozygous tertsa6541 fish become prematurely infertile. All wild-type males but only 5.9% of homozygous males tested, aged 9 or 10 months, produced sperm. (F) Maternal-zygotic mutant embryos derived from tertsa6541/sa6541 intercrosses display a range of phenotypes by 24 h.p.f. including a reduction in head tissue and a shorter tail