Kerafast's Anti-Myosin Heavy Chain, Slow Skeletal Muscle [9812] Antibody monoclonal antibody. The Anti-Myosin Heavy Chain, Slow Skeletal Muscle [9812] Antibody was generated using MYH4 as the antigen. It reacts with Homo Sapiens, Human, Mouse, Rat, Chicken/Bird, and Rabbit. This antibody has been shown to work in applications such as: Immunohistochemistry, and Western Blot.