L-Tryptophanamide (hydrochlori

左旋茶氨酸 L-theanine

左旋茶氨酸 L-theanine 即谷酰基乙胺。是从茶叶中发现的（ Y． Saka-to， 1950）。与谷氨酸同样机制合成。  

Guanidine Hydrochloride Purification of Proteins From SDS

Pepstatin A (2.0 mg/ml)10 ml Leupeptin (1.0 mg/ml)10 ml Aprotinin (5.0 mg/ml)(Protease Inhibitor Cocktail Sigma #P8340)Denaturation Buffer6 M guanidine hydrochloride 57.3 g G-HCl20 mM Hepes 7.9 2 ml 1M Hepes pH 7.910 mM KCl 0.074 g KCl0.5 mM DTT 100 ml 0.5 M

L-DOPA (L-3,4-Dihydroxyphenylalanine)

The nonprotein amino acid, 3,4-dihydroxyphenylalanine (L -DOPA) (Fig. 1) is present in high concentrations (about 3–6%) in Mucuna spp. The in vitro addition of L -DOPA to the red blood cells from individuals deficient in glucose 6-phosphate