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.
Main protein structures levels. Imagine proteins as machines; machines which make all living things, from viruses, bacteria, butterflies, jellyfish, plants and humans function. The human body is made up of approximately 100 trillion cells-each one has a specific function. Each cell has thousands of different proteins, which together make the cell do its job-the proteins are tiny machines within the cell.