Abstract: The invention relates to a closure system for a holder for a reaction vessel in an automatic analysis apparatus. The closure system comprises a lid secured movably on a retainer element, wherein the lid closes an opening of the holder in a closed position and opens it in an open position. The closure system further comprises a restoring element, which is designed in such a way that, depending on the position of the lid, it exerts a restoring force in the direction of the closed position or of the open position.
Abstract: The invention relates to a method for determining the protein Ca-cofactor activity of protein S, wherein the protein Ca-cofactor activity of protein S is measured in a first reaction volume in the absence of a protein S inhibitor and in a second reaction volume in the presence of a protein S inhibitor. The protein Ca-cofactor activity of protein S is determined by calculating the quotient of the assay result of the first reaction volume and the assay result of the second reaction volume.