Level 4 officials are the most experienced officials on the field and have 76 or more games under their belts at the start of the MLS season; all FIFA officials have Level 4 status. According to the 2009 MLS Referee Manual, Level 4 referees earn $875 per game, assistant referees earn $495 and fourth officials earn $285.fficials who work Major League Soccer games are paid based on experience. Referee experience is based on the number of regular-season and playoff games worked and is set in an MLS scale that is comprised of four levels.
The subunits of proteins are called amino acids. Amino acid molecules are smaller than protein molecules and are inside of the protein molecules. Amino acids are joined together by peptide bonds where the-COOH group and the-NH2 group of two consecutive amino acids bond with the loss of a water molecule.
Proteins (also known as polypeptides) are organic compounds made of amino acids arranged in a linear chain and folded into a globular form. The amino acids in a polymer are jo â¦ ined together by the peptide bonds between the carboxyl and amino groups of adjacent amino acid residues.roteins are made out of 20 smaller sub-units called amino acids. these acids contain four chemical elements: carbon, hydrogen, oxygen and nitrogen.