Napins are seed storage proteins, which consist of two polypeptide chains. Which of the following plant species contain(s) napin protein? P. Brassica campestris Q. Zea mays R. Degenia velebitica

Osborne (1924) classified seed storage proteins into groups on the basis of their extraction and solubility in water (albumins), dilute saline (globulins), alcohol-water mixtures (prolamins), and dilute acid or alkali (glutelins). In Crucifereae or Bressicaceae family, the seed storage proteins are called napins. The examples of cruciferae family are- Brassica campestris, Degenia velebitica, Arabis aculeolata etc. Zea mays belongs to the family Poaceae and contains zein as seed storage proteins.