Kh. Engler et al., Toxin-binding properties of cytochrome P450 in Saccharomyces cerevisiae and Kluyveromyces marxianus, BIOTECH LET, 22(1), 2000, pp. 3-8
Microsomes from Kluyveromyces marxianus GK1005 examined by carbon monoxide
difference spectroscopy showed no evidence of cytochrome P450, in contrast
to microsomes isolated from a control strain of Saccharomyces cerevisiae. B
enzo[a]pyrene produced a typical Type I-binding spectrum with microsomes of
both yeasts, with K values of 82 mu M (S. cerevisiae) and 70 mu M (K. marx
ianus). While aflatoxin B-1 generated a typical Type I-binding spectrum wit
h microsomes from S. cerevisiae (K-s of 178 mu M), the toxin did not produc
e a recognisable binding spectrum with microsomes from K. marxianus.