Feedback inhibition in a branched biosynthetic pathway precursor Glutamic acid AGS GK Feedback Feedback inhibition I I inhibition Proline N-acetyl glutamate synthase(AGS) Arginine 乙酰谷氨酸合成酶andg-glutamyl Figure 8-4 Brock Biology of Microorganisms 11/e kinase(GK)谷氨酰激酶 2006 Pearson Prentice Hall,Inc.Feedback inhibition in a branched biosynthetic pathway N-acetyl glutamate synthase (AGS) 乙酰谷氨酸合成酶and g-glutamyl kinase (GK)谷氨酰激酶 precursor