From Wikipedia,
the free encyclopedia
A
molecule may be described as
cis-acting when it affects
other entities only if they are
physically adjacent. It may be
considered 'the opposite' of a 'trans-acting'
molecule.
It is common to describe
transcription factors as
either cis or trans-acting. A cis-acting
transcription promoter facilitates
the transcription of adjacent
polypeptide-encoding sequences
whereas trans-acting promoters
affect the transription of regions
of
DNA not in close
physical proximity.
