Skip to main content


Follow @TetrahymenaSC

We are now shipping live cells, plasmids, genomic DNA, and media packets, although shipping may take somewhat longer than normal. Contact us with any questions.


Stock IDSD01458
Strain NameIA225
AKAcdaE-3 IIA
SpeciesT. thermophila
Genetic DescriptioncdaE-3/cdaE-3 (cdaE-3; II)
MAC Knockins/outs
MIC Knockins/outs
Gene of InterestCDAE (cell division arrest E)
OriginGenomic exclusion progeny following an outcross to B2079-X-VI of a mutant clone that resulted from nitrosoguanidine mutagenesis in 1979 of SB210 followed by cytogamy.
PublicationsNone. The allelic cdaE-1/cdaE-1 (IA137) was described in:
Frankel J, Jenkins LM, Doerder FP, Nelsen EM. 1976. Mutations affecting cell division in tetrahymena pyriformis. I. selection and genetic analysis. Genetics 83(3):489-506.

Frankel J, Nelsen EM, Jenkins LM. 1977. Mutations affecting cell division in tetrahymena pyriformis, syngen 1. II. phenotypes of single and double homozygotes. Dev Biol 58(2):255-75.
CommentsIncomplete fission-zone formation with arrest in late-cytokinesis, with the new oral apparatus often abnormal and frequently wedged within the arrested furrow.

Expressed in many cells at normal growth temperatures, near 100% at 39°. Same phenotype as the allelic IA137 stock,but with stronger expression.

Submitted by Joseph Frankel, University of Iowa
Research Resource IdentifierTSC_SD01458
Requires MTA?No
Academic cost $45