|a positively charged elementary particle, a fundamental constituent of all atomic nuclei, having a charge equal in magnitude to that of the electron|
|secretory vesicles with a carrier protein (neurophysin) both are released upon hormone secretion|
|adenine (ād'n-ēn') Pronunciation Key
A purine base that is a component of DNA and RNA, forming a base pair with thymine in DNA and with uracil in RNA. Adenine is also part of other biologically important compounds, such as ATP, NAD, and vitamin B-12, and occurs in tea. Chemical formula: C5H5N5.