Do copper ions break down the ionic bonds between the polypeptide chains of egg albumen - thus causing it to denature?
In contrast, staining of the tumor for pancreatic polypeptide was strongly positive.
In the molecule above, the two peptides have joined together to form a dipeptide; many peptides join together to form a polypeptide.
It is initially synthesized as a 76 kDa polypeptide using host cell transcription and translation machinery.
Proteins are composed of complex polypeptide chains with unique 3-dimensional structures.
Serine Protease In the diagram above a small peptide is shown being cleaved, while the usual substrate would be a larger polypeptide.
The geometry of the polypeptide hydrogen bonds involving the peptide backbone atoms were also analyzed and shown to be fairly independent of sidechain influences.
The most significant chromophore for proteins is the amide group of the polypeptide backbone.
The polypeptide chains synthesized by the ribosomes bound to the rough E.R. enter the endoplasmic reticulum lumen.
This report documents that islet cell tumors may function by secreting pancreatic polypeptide but not cause symptoms.