cis

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cis

 [sis] (L.)
1. in organic chemistry, having certain atoms or radicals on the same side.
2. in genetics, denoting two or more loci, especially pseudoalleles, occurring on the same chromosome of a homologous pair. See also trans.

CIS

Abbreviation for carcinoma in situ.

cis

/cis / (sis) [L.]
1. in organic chemistry, having certain atoms or radicals on the same side.
2. in genetics, denoting two or more loci, especially pseudoalleles, occurring on the same chromosome of a homologous pair. Cf. . See also cis-trans test, under test.

CIS

Abbreviation for:
cancer information service
carcinoma in situ, see there
care information systems (Medspeak-UK)
Casualty Information Society
catheter-induced spasm
central inhibitory state
Central Issue System (Medspeak-UK)
Chemical Information System
chromosome information system
cisplatin
clinical information system (Medspeak-UK)
community investment strategy (Medspeak-UK)
computerised information system
Coronary Intervention Study
cytokine-inducing substances

CIS

Carcinoma-in-situ, see there.

CIS

Abbreviation for carcinoma in situ.

cis

1. In chemistry, being on the same side. Usually refers to two groups being on the same side of a ring or of a double bond.
2. In genetics, describing two sites on the same molecule of DNA. Compare TRANS.

cis

-active (of a component of a DNA sequence) influencing the activity of adjacent DNA sequences. For example, a PROMOTER sequence influences expression of adjacent genes in the same OPERON. See CIS-TRANS TEST. Compare TRANS -ACTING.

cis

-phase an isomer (see ISOMERISM having similar atoms or groups on the same side of the molecule.

cis,

pref Latin preposition meaning “on this side.” In stereochemistry, it refers to the position of carbon chains extending from a molecule.

CIS

Abbreviation for carcinoma in situ.

cis

[L.] in organic chemistry, having certain atoms or radicals on the same side; in genetics, having the two mutant genes of a pseudoallele on the same chromosome. Compare trans. See also cis-transtest.

cis acting
in molecular biology, a sequence or regulatory protein that is part of the same DNA molecule as the gene of interest. See also trans acting.
cis-acting mutation
in the lactose operon a mutation in the attenuator region that disrupts base pairing in the double-stranded portion of the termination hair pin and permits the RNA polymerase to 'read through' the termination signal.
cis-dominant mutation
occurs in regulatory sequences that are recognized by DNA binding proteins that affect only adjacent genes on the same DNA molecule.