Negative Numbers to Zero. A clever Excel trick to change negative numbers to zero but leave positive numbers unchanged. Below you can find two columns with numbers. To subtract the numbers in column B from the numbers in column A, execute the following steps. 1. Select cell C1. 2. Enter the formula =A1-B1. 3. Click the lower right corner of cell C1 and drag the formula down. Result: 4. To change the negative numbers to zero but leave the positive numbers unchanged, instead of =A1-B1, use =MAX(0,A1-B1) and drag the function down. Result: Explanation: the MAX function returns the maximum of two values. If the result of the formula is negative, the function returns 0.
Dystrophin is a rod-shaped cytoplasmic protein, and a vital part of a protein complex that connects the cytoskeleton of a muscle fiber to the surrounding extracellular matrix through the cell membrane. This complex is variously known as the costamere or the dystrophin-associated protein complex.he dystrophin gene is one of the longest human genes known, covering 2.5 megabases (0.08% of the human genome) at locus Xp21.
Muscular dystrophies are a group of diseases that are passed down genetically. These diseases cause damage and weakness to muscles over time. This damage and weakness is caused by the lack of a protein called dystrophin, which is necessary for normal muscle function.The absence of this protein can cause problems with walking, swallowing, and muscle coordination.hese diseases cause damage and weakness to muscles over time. This damage and weakness is caused by the lack of a protein called dystrophin, which is necessary for normal muscle function. The absence of this protein can cause problems with walking, swallowing, and muscle coordination.