In contrast, patients receiving a single course of teplizumab demonstrated a relative increase in C-peptide levels, suggesting not only a delay in beta cell destruction, but also the recovery of sick or dying beta cells and the restoration of their functionality and insulin secretion.
Refer to the input text as context and select the correct relationship between 'beta cell' and 'insulin' from the available options.
Options: owner of, headquarters location, product/material produced, operator