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.
1 Ribosomes-Ribosomes are cell structures responsible for protein production. 2  Plasmids-Plasmids are gene carrying, circular DNA structures that are not involved in reproduction. 3  Nucleiod Region-Area of the cytoplasm that contains the single bacterial DNA molecule.