Character Escapes. The backslash character (\) in a regular expression indicates that the character that follows it either is a special character (as shown in the following table), or should be interpreted literally. For more information, see Character Escapes in Regular Expressions.
Causes. Acute lymphocytic leukemia occurs when a bone marrow cell develops errors in its DNA. The errors tell the cell to continue growing and dividing, when a healthy cell would normally stop dividing and eventually die.When this happens, blood cell production becomes abnormal.cute lymphocytic leukemia occurs when a bone marrow cell develops errors in its DNA. The errors tell the cell to continue growing and dividing, when a healthy cell would normally stop dividing and eventually die. When this happens, blood cell production becomes abnormal.
Point mutations are single base changes in a gene's DNA sequence. They can be further categorized: 1  Missense mutations cause a single amino acid change within the protein. 2  Nonsense mutations create a premature stop codon, causing the protein to be shortened. 3  Silent mutations do not cause amino acid changes.