I don't know what you are talking about, but all of those vegetables are delicious if cooked properly.
[1] http://chemse.oxfordjournals.org/content/35/2/157.full
[2] http://www.nature.com/news/2006/060918/full/news060918-1.htm...
[3] http://tools.lifetechnologies.com/content/sfs/manuals/qPCR_l...