SP1

(1) (Scalable POWER 1) See IBM SP.

(2) (Service Pack 1) The first service pack introduced to upgrade a major release of software. See service pack.

SP1

Abbreviation for stimulatory protein 1.

SP1

A gene on chromosome 12q13.1 that encodes a transcription factor which up- or downregulates transcription in response to physiological and pathological stimuli. SP1 binds with high affinity to GC-rich motifs and regulates expression of an array of genes involved in various cell processes, including growth, differentiation, immune responses and apoptosis; it may have a role in modulating cell responses to DNA damage and is implicated in chromatin remodelling. SP1 is highly regulated by post-translational modification—e.g., phosphorylation, sumoylation, proteolytic cleavage, glycosylation and acetylation.

SP1

Acronym	Definition
SP1➣Service Pack 1 (Microsoft)
SP1➣Serine Protease 1 (enzyme)
SP1➣Specific Protein 1 (biochemistry)
SP1➣Stimulatory Protein 1 (biochemistry)
SP1➣Scalable Powerparallel System
SP1➣Spacer Peptide 1 (biochemistry)
SP1➣Schwangerschafts-Protein 1 (obstetrics)
SP1➣Standard Professional 1 (teaching license; North Carolina)
SP1➣Signal Processor 1 (4ESS)
SP1➣Steam Propulsionman First Class (USN rating)

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