caa a22 4500 477132375 CHVBK 20180405111707.0 cr unu---uuuuu 170330e19970901xx s 000 0 eng 10.1023/A:1018343526264 doi (NATIONALLICENCE)springer-10.1023/A:1018343526264 Identification of a copper-sensitive ascorbate peroxidase in the unicellular green alga Selenastrum capricornutum [Elektronische Daten] [Kathleen Sauser, J.K. Liu, Tit-Yee Wong] Extracts from the unicellular green alga Selenastrum capricornutum exhibit high superoxide dismutase activity, but only traces of catalase activity. The excess hydrogen peroxide (HO) generated by the superoxide dismutase in S. capricornutum may be degraded by a unique peroxidase. This peroxidase has a high specificity for ascorbate as its electron donor. The enzyme has an optimum pH at 8, is insensitive to cyanide and is inhibited by oxine. Addition of low concentrations of copper to algal cultures stimulates the peroxidase activity threefold. This enzymatic system could be used as a sensitive bioindicator for copper in fresh water. Chapman and Hall, 1997 alga nationallicence ascorbate peroxidase nationallicence biondicator nationallicence copper enzyme nationallicence Selenastrum nationallicence Sauser Kathleen Department of Microbiology and Molecular Cell Sciences, University of Memphis, Memphis, USA aut Liu J.K. Department of Microbiology and Molecular Cell Sciences, University of Memphis, Memphis, USA aut Wong Tit-Yee Department of Microbiology and Molecular Cell Sciences, University of Memphis, Memphis, USA aut Biometals Kluwer Academic Publishers 10/3(1997-09-01), 163-168 0966-0844 10:3<163 1997 10 10534 https://doi.org/10.1023/A:1018343526264 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1018343526264 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sauser Kathleen Department of Microbiology and Molecular Cell Sciences, University of Memphis, Memphis, USA aut NATIONALLICENCE 700 1- Liu J.K. Department of Microbiology and Molecular Cell Sciences, University of Memphis, Memphis, USA aut NATIONALLICENCE 700 1- Wong Tit-Yee Department of Microbiology and Molecular Cell Sciences, University of Memphis, Memphis, USA aut NATIONALLICENCE 773 0- Biometals Kluwer Academic Publishers 10/3(1997-09-01), 163-168 0966-0844 10:3<163 1997 10 10534 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer