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.
The primary level of structure in a protein is the linier sequence of amino acids, formed by a condensation reaction (and therefore the abstraction of water) in protein synthesis. Each amino acid residue is then bonded via peptide bonds.herefore the amide planes define the polypeptide backbone. The secondary level of structure in a protein is the regular folding of the regions of the polypeptide chain. The two most common types are the alpha-helix and the beta-pleated sheet. Both myoglobin and haemoglobin are mostly made up from alpha-helices.