text: CLASSIFICATION OF PROTEIN ON THE BASIS OF SOLUBILITY- Proteins may be classified as SIMPLE PROTEIN and CONJUGATED PROTEINS.\nSIMPLE PROTEIN consist of only amino acid or their derivities. Under simple protein includes-ALBUMINS,GLOBULINS,GLUTELNS,PROLAMINES,ALBUMINOIDS,HISTONES,PROTAMINES.\nCONJUGATED PROTEINS consist of simple proteins in combination with some non-proteinic components.These include- NUCLEOPROTEIN,GLYCOPROTEIN,PHOSPHOPROTEIN,CHROMOPROTEIN,LIPOPROTEIN,METTALOPROTEIN.