| xyloglucan | <plant biology> Plant cell wall polysaccharide containing a backbone of _(1-4) linked glucose residues to most of which single xylose residues are attached as side chains. Galactose, fucose and arabinose may also be present in smaller amounts. It is the major hemicellulose of dicotyledonous primary walls and acts as a food reserve in some seeds. (18 Nov 1997) |
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| xyloglucan 2-fucosyltransferase | <enzyme> Adds 1,2-alphafucosyl units to plant xyloglucans Registry number: EC 2.4.1.- Synonym: GDP-fucose-xyloglucan 1,2-alpha-l-fucosyltransferase (26 Jun 1999) |
| xyloglucan 2-galactosyltransferase | <enzyme> Attaches galactose in a 1,2-beta-linkage to xylosyl side chains that are linked 1,6-alpha- to the 1,4-beta-glucan backbone of plant xyloglucans Registry number: EC 2.4.1.- Synonym: xg galactosyltransferase (26 Jun 1999) |
| xyloglucan 4-beta-D-glucosyltransferase | <enzyme> Catalyses formation of xyloglucan from udp-glucose Registry number: EC 2.4.1.- Synonym: xylo-glctransferase, xyloglucan glucosyltransferase (26 Jun 1999) |
| xyloglucan endo(1-4)-beta-D-glucanase | <enzyme> Hydrolyzes only xyloglucans Registry number: EC 3.2.1.- Synonym: xyloglucanase (26 Jun 1999) |
| xyloglucan endotransglycosylase | <enzyme> Detected in extracts of the growing portions of dicotyledons, monocotyledons, and bryophytes; causes the wall-loosening required for plant cell expansion by transfering a large segment of a xyloglucan molecule to another xyloglucan molecule Registry number: EC 2.4.1.- Synonym: xyloglucan-xyloglucan xyloglucanotransferase, xet transglycosylase, endo-xyloglucan transferase, endoxyloglucan transferase (26 Jun 1999) |
| xylograph | An engraving on wood, or the impression from such an engraving; a print by xylography. Origin: Xylo- + -graph. Source: Websters Dictionary (01 Mar 1998) |
| xylographer | One who practices xylography. Source: Websters Dictionary (01 Mar 1998) |
| xylographic | Of or pertaining to xylography, or wood engraving. Origin: Cf. F. Xylographique. Source: Websters Dictionary (01 Mar 1998) |
| xylographical | Of or pertaining to xylography, or wood engraving. Origin: Cf. F. Xylographique. Source: Websters Dictionary (01 Mar 1998) |
| xylography | 1. The art of engraving on wood. 2. The art of making prints from the natural grain of wood. 3. A method pf printing in colours upon wood for purposes of house decoration. Origin: Xylo-: cf. F. Xylographie. Source: Websters Dictionary (01 Mar 1998) |
| xyloid | Resembling wood; having the nature of wood. Origin: Xylo-. Source: Websters Dictionary (01 Mar 1998) |
| xyloidin | <chemistry> A substance resembling pyroxylin, obtained by the action of nitric acid on starch. Synonym: nitramidin. Origin: Xylo-. Source: Websters Dictionary (01 Mar 1998) |
| xyloketose | <biochemistry> A 5 carbon ketose sugar, whose 5 phosphate is an intermediate in the pentose phosphate pathway and the Calvin cycle. (18 Nov 1997) |
| xylol | <chemistry> Same as Xylene. Origin: Xylo- + L. Oleum oil. Source: Websters Dictionary (01 Mar 1998) |
| XYY syndrome |
XYY syndrome is a rare chromosomal disorder that affects males. It is caused by the presence of an extra Y chromosome. Males normally have one X and one Y chromosome. However, individuals with this syndrome have one X and two Y chromosome. Affected individuals are usually very tall and thin. Many experience severe acne during adolescence. Additional symptoms may include antisocial or behavioral problems and learning disabilities. ...
출처: en.wikipedia.org/wiki/Xyy_syndrome
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| xylene |
The term xylenes refers to a group of 3 benzene derivatives which encompasses ortho-, meta-, and para- isomers of dimethyl benzene. The o-, m- and p- isomers specify to which carbon atoms (of the main benzene ring) are the 2 methyl groups attached. Counting the carbon atoms from any arbitrary point, and C1 being to the right of C2, and C2 being to the right to C3, and so on, the o- isomer has the IUPAC name of 1,2-dimethylbenzene. The m- isomer has the IUPAC name of 1,3-dimethylbenzene. ...
출처: en.wikipedia.org/wiki/Xylene
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| xylol |
The term xylenes refers to a group of 3 benzene derivatives which encompasses ortho-, meta-, and para- isomers of dimethyl benzene. The o-, m- and p- isomers specify to which carbon atoms (of the main benzene ring) are the 2 methyl groups attached. Counting the carbon atoms from any arbitrary point, and C1 being to the right of C2, and C2 being to the right to C3, and so on, the o- isomer has the IUPAC name of 1,2-dimethylbenzene. The m- isomer has the IUPAC name of 1,3-dimethylbenzene. ...
출처: en.wikipedia.org/wiki/Xylol
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| XYY syndrome |
a disorder in which a man has an extra Y chromosome, causing him to be unusually tall and to have behavioral disorders
출처: www.american-depot.com/services/resources_gl_x.asp
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| XYY syndrome |
Genetic condition in males with extra Y chromosome (in 1 in 1000 male births). Symptoms: tall stature (over 6'), may including sterility, developmental delay, learning problems.
출처: aspin.asu.edu/geneinfo/glos-x.htm
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| XY | of Australia |
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| XY | (genetics) abnormal complement of sex hormones in a male who has two Y chromosomes |