1. Dept. of Food Science; Univ. of Otago; PO Box 56; Dunedin; New Zealand
2. Dept. of Biochemistry; Univ. of Otago; PO Box 56; Dunedin; New Zealand
3. NSW Dept. of Primary Industries; Centre for Red Meat and Sheep Development; PO Box 129; Cowra; NSW 2794; Australia