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.
Proteins of the mammalian cell are synthesized on ribosomes that are either free in the cytosol or attached to the endoplasmic reticulum. Ribosomes suspended in the cytosol make proteins that function in the cytosol. Bound ribosomes make proteins that are included in the cell's membrane or exported from the cell.