apekha itu protein ? long polymer made up of amino acid. btol! yeeha. amino acid neh die ade 20 common type . cane die di-classdified kn eh? *based on R group la eh. em. mcm ni... ade 5. kalo hydrophobic ade 2 1) nonpolar aliphatic. 2)aromatic R kalo hydrophilic lak ade 3. 1)polar uncharged 2)+vely charged 3)-vely charged msg2 ade contoh ye. n mst n mst ingat ok... mmg berat. tp, i'll try. ganbate lisa. okeh. stat dr nonpolar aliphatic. valine, leucine, isoleucine, proline, glycine, n alanine kalo aromatic R lak... phenylalanine, tyrosine n trytophan. tnpa pndg. tulis balik.... phenylalanine, tyrosine, trytophan. gud! next is... polar uncharged yg neh pelik skit. sbb ade yg hydroxyl(-OH) group, sulphur(S) n also amide(-CONH2) group n da bad news are sume ade example, yg perlu dihafal ye... em,for hydroxyl uh.. serine n threonine sulphur lak.. cysteine n methionine n amide lak.. asparagine n glutamine +vely charged lak. lysine, arginine n histidine(basic) -vely charg