(1) The various reactions which involve the synthesis of complex molecules can be grouped under the heading of anabolism, whereas the breakdown of complex molecules is known as catabolism .(2) Muscle catabolism is a hallmark of sepsis and results from accelerated breakdown of myofibrillar proteins, such as actin and myosin.(3) During normal catabolism , protease enzymes break down carboxylase enzymes and reclaim the associated amino acids and biocytin for recycling.(4) The process, in which the body basically metabolizes itself, is called catabolism and leads to muscle loss and weakness.(5) Ammonium produced by catabolism of protein is then excreted in urine.(6) However, birds may preferentially catabolize assimilation organs to avoid catabolizing flight muscles that could impair flying ability.(7) There are thus a number of different requirements for mitochondrial metabolism, ranging from biosynthesis to catabolic processes that may or may not result in ATP synthesis.(8) You can help prevent your body from becoming catabolic by supplying it with all the necessary nutrients at the time when it needs them the most - during intense workouts.(9) During catabolic stress intracellular glutamine levels can drop more than 50 percent, and it is under these circumstances that supplemental glutamine becomes necessary.(10) Fuels must be mobilized and delivered to the muscle cells in order to be catabolized aerobically for ATP production to sustain muscle contraction.(11) Alanine and glutamine account for about 80% of the amino acids released from skeletal muscle during catabolic periods such as intense training or injury.(12) Over time, your body begins to catabolize muscle tissue, converting it to glucose for energy.(13) As a result, a bird with large glycogen stores may catabolize less protein to maintain blood glucose levels during migration than a bird with small glycogen reserves.(14) A number of synthetic compounds based on testosterone have been developed in the hope of keeping a severely debilitated patient (such as a major burn victim) from catabolizing their own muscle tissue.(15) There they are converted to fatty acids, amino acids, and glycogen, or else oxidized by the various catabolic pathways of cells.
