Linoleic acid is converted into .gamma.-linolenic acid by the enzyme .DELTA.6-desaturase. The present invention is directed to an isolated nucleic acid comprising the .DELTA.6-desaturase gene. More particularly, the isolated nucleic acid comprises the promoter, coding region and termination...http://www.google.com.au/patents/US5689050?utm_source=gb-gplus-sharePatent US5689050 - Production of gamma linolenic acid by a .DELTA.6-desaturase