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Ectopic expression is an abnormal gene expression in a cell type, tissue type, or developmental stage in which the gene is not usually expressed. [ 1 ] [ 2 ] The term ectopic expression is predominantly used in studies using metazoans, especially in Drosophila melanogaster for research purposes.
Promiscuous gene expression (PGE), formerly referred to as ectopic expression, is a process specific to the thymus that plays a pivotal role in the establishment of central tolerance.
Gene conversion is the process by which one DNA sequence replaces a homologous sequence such that the sequences become identical after the conversion. [1] Gene conversion can be either allelic, meaning that one allele of the same gene replaces another allele, or ectopic, meaning that one paralogous DNA sequence converts another.
Behavioral epigenetics is the field of study examining the role of epigenetics in shaping animal and human behavior. [1] It seeks to explain how nurture shapes nature, [2] where nature refers to biological heredity [3] and nurture refers to virtually everything that occurs during the life-span (e.g., social-experience, diet and nutrition, and exposure to toxins). [4]
A neomorphic mutation causes a dominant gain of gene function that is different from the normal function. [1] A neomorphic mutation can cause ectopic mRNA or protein expression, or new protein functions from altered protein structure. Changing wildtype gene dose has no effect on the phenotype of a neomorph. [2] m/Df = m/+ = m/Dp
Ectopic enamel, a tooth abnormality, where enamel is found in an unusual location, such as at the root of a tooth; Ectopic expression, the expression of a gene in an abnormal place in an organism; Ectopic hormone, a hormone produced by a tumor, such as small-cell carcinoma, can cause Cushing's syndrome
An ectopic pregnancy is a common complication that can be life-threatening to the mother if left untreated. Here's what you need to know.
Micrograph showing a duodenal biopsy with gastric heterotopia; H&E stain. In medicine, heterotopia is the presence of a particular tissue type at a non-physiological site, but usually co-existing with original tissue in its correct anatomical location.