using a subclone representing the 3'-untranslated portion of the 2.4 kb mrna encoding this cytokeratin , designated xenck55 ( 5/6 ) , in northern blot experiments , we found that it differs from the only other xenopus type ii cytokeratin known , i.e . the simple epithelium-type component xenck1 ( 8 ) , in that it is absent in unfertilized eggs and pregastrulation embryos .
C0010803
cytokeratin
C1179973
type ii cytokeratin