POLYPEPTIDES

摘要

A polypeptide (interacting polypeptide) capable of interacting with a Smad polypeptide wherein the interacting polypeptide comprises the amino acid sequence PP(T/N)K and is less than 150 amino acids in length or is not full- length Xenopus or human FAST1 or a fragment thereof, mouse FAST2, Xenopus Milk, Xenopus Mixer or Xenopus Bix2. The Smad polypeptide may be Smad2 or Smad3. The interacting polypeptides are useful in screening assays and in medicine.