TY - JOUR N2 - Lipolytic activity was assayed in samples of Antarctic krill frozen in different conditions and in its liquid digesta with synthetic (tributylglycerol, esters of 2-naphtol and fatty acids C3, C9 , C14 and C18 ) and natural (olive oil) substrates. It was testified that the lipolytic activity is several-fold higher in the crustaceans with high food intake than in those with an empty digestive tract. Krill lipases show higher activity against esters of unsaturated fatty acids that against analogous derivatives of saturated ones and 10-fold higher affinity tributylglycerol (Km = 1.12 mM). Their maximal activity is at pH 6.4 and 37°C. E. superba lipases preserve total activity up to 35°C for 45 minutes, and are completely inactivated at 55°C for 5 minutes. Prevailing part of lipolytic activity is present in krill cephalothorax, however, extracts from krill abdomen also display a marked activity. Krill lipases are probably resistant to an attack of crustacean's proteinases. L1 - http://www.czasopisma.pan.pl/Content/110986/PDF/1995-3-4_185-197.pdf L2 - http://www.czasopisma.pan.pl/Content/110986 PY - 1995 IS - No 3-4 EP - 198 KW - Antarctic krill KW - digestive enzymes KW - lipases A1 - Turkiewicz, Marianna A1 - Kalinowska, Halina A1 - Krystynowicz, Alina A1 - Kałużewska, Maria PB - Polish Academy of Sciences PB - Committee on Polar Research VL - vol. 16 DA - 1995 T1 - Lipolytic activity of Antarctic krill, Euphausia superba Dana SP - 185 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/110986 T2 - Polish Polar Research ER -