- obsolete abortive mitotic cell cycle
OBSOLETE. A cell cycle in which mitosis is begun and progresses normally through the end of anaphase, but not completed, resulting in a cell with increased ploidy.
- co-translational protein modification
The process of covalently altering one or more amino acids in a protein after translation has begun but before the protein has been released from the ribosome.
- Group III intron splicing
The splicing of Group III introns. This occurs by a ribozymic mechanism where the intron sequence forms a distinct 3D structure, characteristic of Group III introns, that is involved in catalyzing the splicing reactions, though protein factors are also required in vivo. Splicing occurs by a series of two transesterification reactions begun by a bulged adenosine residue within the intron sequence as the initiating nucleophile. The intron is excised as a lariat. Though very similar in structure and mechanism to Group II introns, Group III introns are smaller and more streamlined and the splice site consensus sequences are not as well conserved.
- exit from diapause
The dormancy process that results in exit from diapause. Diapause is a neurohormonally mediated, dynamic state of low metabolic activity. Associated characteristics of this form of dormancy include reduced morphogenesis, increased resistance to environmental extremes, and altered or reduced behavioral activity. Full expression develops in a species-specific manner, usually in response to a number of environmental stimuli that precede unfavorable conditions. Once diapause has begun, metabolic activity is suppressed even if conditions favorable for development prevail. Once initiated, only certain stimuli are capable of releasing the organism from this state, and this characteristic is essential in distinguishing diapause from hibernation.
- maintenance of diapause
The dormancy process that results an organism remaining in diapause. Diapause is a neurohormonally mediated, dynamic state of low metabolic activity. Associated characteristics of this form of dormancy include reduced morphogenesis, increased resistance to environmental extremes, and altered or reduced behavioral activity. Full expression develops in a species-specific manner, usually in response to a number of environmental stimuli that precede unfavorable conditions. Once diapause has begun, metabolic activity is suppressed even if conditions favorable for development prevail. Once initiated, only certain stimuli are capable of releasing the organism from this state, and this characteristic is essential in distinguishing diapause from hibernation.
- entry into diapause
The dormancy process that results in entry into diapause. Diapause is a neurohormonally mediated, dynamic state of low metabolic activity. Associated characteristics of this form of dormancy include reduced morphogenesis, increased resistance to environmental extremes, and altered or reduced behavioral activity. Full expression develops in a species-specific manner, usually in response to a number of environmental stimuli that precede unfavorable conditions. Once diapause has begun, metabolic activity is suppressed even if conditions favorable for development prevail. Once initiated, only certain stimuli are capable of releasing the organism from this state, and this characteristic is essential in distinguishing diapause from hibernation.
- pancreatic A cell fate commitment
The commitment of a cell to a pancreatic A cell and its capacity to differentiate into a pancreatic A cell. A pancreatic A cell is a cell in the pancreas that secretes glucagon.