300936 Study Guide - Final Guide: Aliphatic Compound, Imidazole, Isoelectric Point
Document Summary
Lysine lo(cid:374)g + side (cid:272)hai(cid:374), al(cid:449)a(cid:455)s e(cid:454)ist as positi(cid:448)e. Lo(cid:374)g aliphati(cid:272) side (cid:272)hai(cid:374), topped off (cid:271)(cid:455) a(cid:374) a(cid:373)i(cid:374)o group. Arginine lo(cid:374)g + side (cid:272)hai(cid:374), al(cid:449)a(cid:455)s e(cid:454)ist as positi(cid:448)e. Long aliphatic side chain, topped off by a guanidium group. Histidi(cid:374)e"s i(cid:373)idazole side (cid:272)hai(cid:374) (cid:272)a(cid:374) (cid:271)e u(cid:374)(cid:272)harged or positi(cid:448)el(cid:455) (cid:272)harged at neutral (physiological) ph. Histidi(cid:374)e fou(cid:374)d at the a(cid:272)ti(cid:448)e sites of e(cid:374)z(cid:455)(cid:373)es that require a proton donor or proton. Asparatate short aliphati(cid:272) side (cid:272)hai(cid:374) topped off (cid:271)(cid:455) a (cid:374)egati(cid:448)e (cid:272)harge, thus making it a negatively charged amino acid because it is an extra negative charge to the normal carboxyl group hanging off the alpha carbon. Glutamate short aliphati(cid:272) side (cid:272)hai(cid:374) topped of (cid:271)(cid:455) a (cid:374)egati(cid:448)e (cid:272)harge, thus making it a negatively charged amino acid because it is an extra negative charge to the normal carboxyl group hanging off the alpha carbon. I(cid:373)porta(cid:374)t (cid:374) a protei(cid:374) (cid:271)e(cid:272)ause it (cid:272)a(cid:374) a(cid:272)(cid:272)ept a proto(cid:374) (cid:271)(cid:455) (cid:374)eutralizi(cid:374)g its negative charge.
