Complex sentence: Affimers are composed of a scaffold, which is a stable protein based on the cystatin protein fold displaying two peptide loops and an N-terminal sequence that can be randomised to bind different target proteins with high affinity and specificity similar to antibodies.
Split into simpler sentences: Affimers are composed of a scaffold, which is a stable protein based on the cystatin protein fold. They display two peptide loops and an N-terminal sequence that can be randomised to bind different target proteins with high affinity and specificity similar to antibodies.