Tear lactoferrin

Tear lactoferrin (abbreviation LF) is named for it was first found in cow's milk and has a strong ability to bind high iron. It is a glycoprotein with an isoelectric point of about pH 7.8 and a molecular weight of 75-86kD. The protein part is composed of a polypeptide chain. LF can inhibit the growth of a variety of bacteria, can also promote the antibacterial effect of lysozyme, and synergistic with SIgA, the antibacterial activity is stronger than when both exist alone. LF is found in a variety of body fluids and secretions such as milk, tears, saliva, semen, urine, pancreatic juice, bile and respiratory secretions. LF in human body fluids has the same immunological characteristics.