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.
Let's review: 1  The first step in protein production is the transcription of DNA to mRNA in the nucleus. 2  The next organelles involved are ribosomes.  The Golgi apparatus is involved for proteins destined to be transported to the cell membrane and acts as the cell's post office.