Stable at acidic (pH 1.0-5.0) and alkaline (pH 9.0 and 11.0) conditions. Thermostable even up to 100 degrees Celsius. Myosin is a hexamer of 2 heavy chains and 4 light chains. Muscle (at protein level). O-glycosylated. Causes an allergic reaction in human. Binds to IgE in all 7 patients tested allergic to shrimp. The IgE-binding is not affected in the temperature range of 30 to 100 degrees Celsius, by acidic or alkaline pH or by pepsin digestion, but is reduced by 4-hour digestion with pancreatin. The conformational epitopes rather than the linear epitopes seem to be predominantly recognized by IgE.