| SIT4 protein phosphatase | <enzyme> From saccharomyces cerevisiae; functions in late g1 for progression into s phase Registry number: EC 3.1.3.- (26 Jun 1999) |
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| site | The spatial confines of a particular project. (09 Oct 1997) |
| site potential tree | A tree that has attained the average maximum height possible given site conditions where it occurs. (05 Dec 1998) |
| site preparation | Various treatments applied to a harvested area to promote regeneration of the site. (05 Dec 1998) |
| site specific mutation | An alteration of the structure of a gene at a specific sequence, usually referring to experimentally produced changes in gene sequence. (05 Mar 2000) |
| site-directed mutagenesis | <molecular biology> Any of several methods used to create specific alterations in a gene. (09 Oct 1997) |
| site-specific DNA methyltransferase (cytosine-specific) | <enzyme> An enzyme responsible for producing a species-characteristic methylation pattern on cytosine residues in a specific short base sequence in the host cell's DNA. The enzyme catalyses the methylation of DNA cytosine in the presence of s-adenosyl-l-methionine to form s-adenosyl-l-homocysteine and DNA containing 5-methylcytosine. Registry number: EC 2.1.1.73 (12 Dec 1998) |
| site-specific DNA-methyltransferase (adenine-specific) | <enzyme> An enzyme responsible for producing a species-characteristic methylation pattern on adenine residues in a specific short base sequence in the host cell DNA. The enzyme catalyses the methylation of DNA adenine in the presence of s-adenosyl-l-methionine to form DNA containing 6-methylaminopurine and s-adenosyl-l-homocysteine. Registry number: EC 2.1.1.72 (12 Dec 1998) |
| site-specific mutagenesis | <cell culture, molecular biology> An in vitro technique in which an alteration is made at a specific site in a DNA molecule, which is then reintroduced into a cell. Various techniques are used, for the cell biologist, a very powerful approach to determining which parts of a protein or nucleotide sequence are critical to function. (18 Nov 1997) |
| site-specific recombination | <molecular biology> A type of recombination that occurs between two specific short DNA sequences present in the same or in different molecules. An example is the integration and excision of _ prophage. (18 Nov 1997) |
| sited | Having a site; situated. "[The garden] sited was in fruitful soil." (Chaucer) Source: Websters Dictionary (01 Mar 1998) |
| sitfast | <veterinary> A callosity with inflamed edges, on the back of a horse, under the saddle. Source: Websters Dictionary (01 Mar 1998) |
| sito- | Food, grain. Origin: G. Sitos, sition (05 Mar 2000) |
| sitology | <study> A treatise on the regulation of the diet; dietetics. Alternative forms: sitiology. Origin: Gr. Food. Source: Websters Dictionary (01 Mar 1998) |
| sitophobia | <psychology> A version to food; refusal to take nourishment. Alternative forms: sitiophobia. Origin: Gr. Phobos = fear (16 Mar 1998) |
| modified sit-ups | There are several classic examples that will not put strain on your lower back: 1) lay on your back with your knees flexed and feet flat on the floor. 2) Raise your head and torso slightly off the floor with your fingers laced behind your head (abdominal crunch). (27 Sep 1997) |
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| si op. sit | <abbreviation> L. Si opus sit, if needed. (05 Mar 2000) |
| quoties opus sit | <abbreviation> As often as necessary. Origin: L. (05 Mar 2000) |