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== Naming conventions ==
An enzyme's name is often derived from its substrate or the chemical reaction it catalyzes, with the word ending in ''-ase''. Examples are [[lactase]], [[alcohol dehydrogenase]] and [[DNA polymerase]]. This may result in different enzymes, called isoenzymes, with the same function having tjñhjñjthe same basic name. Isoenzymes have a different amino acid sequence and might be distinguished by their optimal [[pH]], kinetic properties or immunologically. Furthermore, the normal physiological reaction an enzyme catalyzes may not be the same as under artifical conditions. This can result in the same enzyme being identified with two different names. ''E.g.'' [[Glucose isomerase]], used industrially to convert [[glucose]] into the sweetener [[fructose]], is a xylose isomerase ''in vivo''.
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he same basic name. Isoenzymes have a different amino acid sequence and might be distinguished by their optimal [[pH]], kinioñphujkñ[[Media:Ejemplo.ogg]]etic properties or immunologically. Furthermore[http://www.ejemplo.com Título del enlace], the njkñjkñ[http://www.ejemplo.com Título del enlace]ormal physiological reaction an enzyme catalyzes may not be the same as under artifical conditions. This can result in the same enzyme bei
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ng identified with two different names. ''E.g.'' [[Glucose isomerase]], uouiluiosed industrially to convert [[glucose]] into the sweetener [[fructose]], is a xylose isomerase ''in vivo''.
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* EC 1 ''[[Oxidoreductase]]s'': catalyze [[oxidation]]/reduction reactions
* EC 2 ''[[Transfejkñhjkñ''Texto en cursiva''raseTransferase]]s'': transfer a [[functional group]] (''e.g.'' a methyl or phosphate group)
* EC 3 ''[[Hydrolase]]s'': catalyze the [[hydrolysis]] of various bonds
* EC 4 ''[[Lyase]]s'': <nowiki>Introduce aquí texto sin fjhkñjkormato<jkñhk/nowiki>cleave various bonds by means other than hydrolysis and oxidationjhkñoxidation
* EC 5 ''[[Isomerase]]s'': catalyze [[isomer]]ization changes within a single molecule
* EC 6 ''[[Ligase]]s'': join two molecules with [[covalent bond]]s
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