N-terminal_telopeptide
N-terminal telopeptide
Chemical compound
The N-terminal telopeptide (NTX), also known as amino-terminal collagen crosslinks, is the N-terminal telopeptide of fibrillar collagens such as collagen type I and type II. It is used as a biomarker to measure the rate of bone turnover. NTX can be measured in the urine (uNTX) or serum (serum NTX).[1] The peptide consists of eight amino acids with the sequence YDEKSTGG.[2]