P21

p21 (CDKN1A) – Research-Grade Recombinant Regulatory Protein

p21 is a single-chain regulatory protein encoded by the CDKN1A gene and functions as a cyclin-dependent kinase interaction partner within cell cycle signaling models. This full-length 164–amino acid construct is structurally distinct from short peptide fragments and represents a multi-domain protein system suitable for controlled laboratory study.

In research environments, recombinant p21 is utilized as a reference material for investigating protein–protein interaction dynamics, regulatory domain mapping, and structure–function relationships associated with cell cycle control pathways. Its defined amino acid sequence supports reproducible analytical characterization under in vitro conditions.

Unlike discrete synthetic peptides, p21 exhibits higher-order protein folding and domain-level interaction behavior. This material is intended strictly for laboratory research use only and is not designed for human or veterinary application.