Explain why bacteria with the gene for the enzyme beta-lactamase are not susceptible to penicillin G. Support your explanation by creating a diagram of penicillin G. Label the beta-lactam ring.

You gathered your data from Lab 4, and found the following values: Total Activity of lysozyme in HEW: 14 units Total Activity of lysozyme in carb 1: 21 units Total amount of protein in HEW: 70 mg Total amount of protein in Carb 1: 15 mg Calculate the extent of purification of lysozyme in Carb 1.       150%     7 fold     70%     15 fold

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give an example like the reaction mechanism of serin protease for example, with pictures & full explanation

1. The amino acid sequence for the protein lysozyme is given below. Estimate the isoelectric point for lysozyme protein. The pK, values are provided in Table 3.1. KVFGRCELAAAMKRHGLDNYRGYSLGNWVCAAKFESNFNTQATNRNT DGSTDYGILQINSRWWCNDGRTPGSRNLCNIPCSALLSSDITASVNCAKK IVSDGNGMNAWVAWRNRCKGTDVQAWIRGCRL Here's the sequence in this form: LYS VAL PHE GLY ARG CYS GLU LEU ALA ALA ALA MET LYS ARG HIS GLY Table 3.1 Typical pk, values of ionizable groups in proteins Group Acid Typical pK, Base Terminal a-carboxyl 3.1 group Aspartic acid Glutamic acid 4.1 N. Histidine 6.0 -N + H Terminal a-amino group 8.0 Cysteine 8.3 Тутosine 10.9 + H Lysine 10.8 H H. + N-H Arginine 12.5 N-H N-H Note: Values of pk, depend on temperature, ionic strength, and the microenvironment of the ionizable group. in

Which statement is true for the active site residues of RNase A, lysozyme, or trypsin? Select any/all answers that apply. O A. His12 (RNase A) initially acts as an acid. O B. His119 (RNase A) initially acts as an acid. O C. Glu35 (lysozyme) initially acts as an acid. O D. His57 (trypsin) initially acts as an acid. O E. Ser195 (trypsin) initially acts as an acid.

The pathway for arginine biosynthesis in Neurospora crassa involves several enzymes that produce a series of intermediates as shown. O O O O ornithine citrulline ARG-E arginosuccinate arginine N-acetylornithine arginine You did a cross between ARG-E ARG-H* and ARG-E* ARG-H¯¯ Neurospora strains and identified an Arg- strain from an NPD tetrad. (Assume that Neurospora forms tetrads in the same way yeast do.) Which compound would rescue growth of this Arg- spore? N-aceltylornithine ARG-F ornithine citrulline ARG-G ARG-H → argininosuccinate

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b. Cleavage with chymotrypsin produces the following fragments: Band A: CN , NLQY, GIVEQCCHKRSEY Band B: F, Y, DPTKM, IACCVRGF, RTTGHLCGKDLVNALY Cleavage with Staphilococcus aureus V8 protease produces the following fragments: Band A: GIVE, YNLQNYCN, QCCHKRCSE Band B: PTKM, RTTGHLCGKD, LVNALYIACGVRGFFYD What is the amino acid sequence of the protein? Type your response