| ER | efficiency ratio; epigastric region; ejection rate; electroresection; emergency room; endoplasmic re... |
|---|---|
| ER- | decreased estrogen receptor |
| ER+ | increased estrogen receptor |
| ERA | electrical response activity; electroencephalic response audiometry; Electroshock Research Associati... |
| ERP | early receptor potential; effective refractory period; elodoisin-related peptide; endoscopic retrogr... |
| Lyon hypothesis | <genetics> Hypothesis, first advanced by Lyon, concerning the random inactivation of one of the two X chromosomes of the cells of female mammals. In consequence females are chimaeric for the products of the X chromosomes, a situation that has been exploited in female Negroes (who are heterotypic for isozymes of glucose 6 phosphate dehydrogenase) as a means to confirm the monoclonal origin of papillomas and of atherosclerotic plaques. (20 Mar 1998) |
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