Heparinase II, from Flavobacterium Heparinum

Heparinase II (heparin lyase II) cleaves heparin and heparan sulfate.

Specificity of heparinase II (heparin lyase II) on heparin and heparan sulfate

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Catalog number: AG00-6512

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Research reagent (glycobiology, preparation of oligosaccharide libraries from heparin and heparan sulfate).

General Information

Synonyms: Heparitinase II, heparin lyase II

Gene Source: Native Flavobacterium Heparinum

EC Number: Not assigned

CAS Number: 149371-12-0

MDL Number: MFCD00131319

Catalyzed Reaction: Heparinase II cleaves, via an elimination mechanism, sulfated polysaccharide chains containing 1-4 linkages between hexosamines and uronic acid residues (both iduronic and glucuronic acid residues). The reaction yields oligosaccharide products (mainly disaccharides) containing unsaturated uronic acids which can be detected by UV spectroscopy at 232 nm. The enzyme cleaves both heparin and heparan sulfate, with the heparan sulfate activity being about twice as high as the heparin activity.

Substrate Specificity: Heparin, heparan sulfate


Molecular weight: 84.1 kDa

Isoelectric point: 9.1 – 9.2

pH optimum for activity: 7.6

pH range for activity: 5 – 9

Optimal temperature range: 20 ℃ – 37 ℃

Purity: ≥ 98 % by reversed phase HPLC analysis

Protein impurities: < 0.1%

Specific Activity: > 15 IU/mg (heparin as substrate), > 18 IU/mg (heparan sulfate as substrate)

Concentration: 4 IU/mL

Unit Definition: One international unit (IU) of heparinase II is defined as the amount of enzyme that will liberate 1.0 μmole unsaturated oligosaccharides from heparin or heparan sulfate per minute at 35 ℃ and pH 7.0.

Stability: Expiration of heparinase II is 12 months from manufacturing date frozen at – 20 ℃ in PBS.


Heparinase II is useful in many applications (usually with heparinase I and heparinase III), for example:

  1. As research reagent (glycosaminoglycan degradation).
  2. For the preparation of di- and oligo-saccharides of heparin and heparan sulfate and the preparation of oligosaccharide libraries.


  1. McLean, M.W., et al. Proc. 8th Int. Symp. Glycoconjugates 1, 73, (1985)
  2. Moffat, C.F., et al. Proc. 8th Int. Symp. Glycoconjugates 1, 79, (1985)
  3. Lohse, D.L., and Linhardt, R.J. J. Biol. Chem. 267, 24347, (1992)

Heparinase I and III

In addition to heparinase II, we also provide other heparinases (heparinase I and heparinase III).

Know more about heparinases.

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