V
Vesa Harjunpää
Researcher at VTT Technical Research Centre of Finland
Publications - 10
Citations - 830
Vesa Harjunpää is an academic researcher from VTT Technical Research Centre of Finland. The author has contributed to research in topics: Trichoderma reesei & Kraft process. The author has an hindex of 7, co-authored 10 publications receiving 818 citations.
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Journal ArticleDOI
Softwood hemicellulose-degrading enzymes from Aspergillus niger: Purification and properties of a β-mannanase
Pia Ademark,Arthur Varga,József Medve,Vesa Harjunpää,Torbjörn Drakenberg,Folke Tjerneld,Henrik Stålbrand +6 more
TL;DR: Analysis by 1H NMR spectroscopy during hydrolysis of mannopentaose showed that the enzyme acts by the retaining mechanism, and most probably lacks a cellulose binding domain since it was unable to adsorb on cellulose.
Journal Article
Effect of cooking and bleaching on the structure of xylan in conventional pine kraft pulp
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Characterisation of 4-deoxy-β-l-threo-hex-4-enopyranosyluronic acid attached to xylan in pine kraft pulp and pulping liquor by 1H and 13C NMR spectroscopy
Anita Teleman,Vesa Harjunpää,Maija Tenkanen,Johanna Buchert,Tiina Hausalo,Torbjörn Drakenberg,Tapani Vuorinen +6 more
TL;DR: HMBC and NOESY experiments showed that hexenuronic acid is attached beta-elimination product of 4-O-methylglucuronic Acid and is formed during kraft pulping, and NoESY data further indicated that Hexenuonic acid protrudes from the main xylan chain.
Journal ArticleDOI
Tryptophan 272: an essential determinant of crystalline cellulose degradation by Trichoderma reesei cellobiohydrolase Cel6A
Anu Koivula,Tiina Kinnari,Vesa Harjunpää,Laura Ruohonen,Anita Teleman,Torbjörn Drakenberg,Juha Rouvinen,T. Alwyn Jones,Tuula T. Teeri +8 more
TL;DR: In this article, the authors predicted an additional ring stacking interaction for a sixth glucose moiety with a tryptophan residue (W272) found on the domain surface, which suggests it has a specialised role in crystalline cellulose degradation, possibly in guiding a glucan chain into the tunnel.
Journal ArticleDOI
Cello-oligosaccharide hydrolysis by cellobiohydrolase II from Trichoderma reesei. Association and rate constants derived from an analysis of progress curves.
Vesa Harjunpää,Anita Teleman,Anu Koivula,Laura Ruohonen,Tuula T. Teeri,Olle Teleman,Torbjörn Drakenberg +6 more
TL;DR: The hydrolysis of soluble cello-oligosaccharides, with a degree of polymerisation of 4-6, catalysed by cellobiohydrolase II from Trichoderma reesei was studied using 1H-NMR spectroscopy and HPLC.