KX Modifier - SPECIFIC REQUIRED DOCUMENTATION ON FILE. KX -- SPECIFIC REQUIRED DOCUMENTATION ON FILE. (EFFECTIVE DATE 7/1/2002) This modifier may be used to indicate that specific required documentation is on file in the patient's medical record. Documentation must be submitted upon request.
Proteins are made of amino acids hooked end-to-end like beads on a necklace. To simulate. a protein, you will make a model of your protein using a long chenille stem (the fuzzy. covered wire) and colored beads.
Primary Structure: The unique sequence of amino acids that makes up a protein or polypeptide chain. Peptide bonds are created by enzyme catalysed condensation reactions and broken down by enzyme catalysed hydrolysis reactions. Breaking down proteins is important in many areas of the body, not merely in digestion.