CHEM C138
Natural Product Biosynthesis: Chemical Logic and Enzymatic Machinery
Grades
3.71
Average grade awarded in CHEM C138. Not a student rating: this is what the grades were.
In the A range
81%
of the 42 letter grades
D, F or W
0.0%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
0%
nobody in the record took it pass/no pass
The registrar's own records: 42 grades over 3 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
No summer session is in that record.
The table below splits them, and term averages across those 3 terms ran 3.54 to 3.92.
Historical grades for all professors, across recorded terms. The course summary above includes all professors.
- A+ 8 · 19.0%
- A 21 · 50.0%
- A- 5 · 11.9%
- B+ 1 · 2.4%
- B 3 · 7.1%
- B- 2 · 4.8%
- C 1 · 2.4%
- C- 1 · 2.4%
Percentages are of the 42 letter grades. Grey bars are non-letter outcomes.
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Spring 2027 |
|---|---|---|---|---|---|---|---|
| TANG, YI reviews ↗ | 3.69 | 3.71 | 42 | 3 | 81% | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Work types reported in BruinWalk reviews of this course, across recorded instructors and terms. They may differ from this term's syllabus.
dibs has not read this course’s reviews, so it cannot say what kind of work it sets. That is dibs not having looked. It is not a course without papers or exams, and the reviews linked below are the answer until dibs catches up.
What comes first
dibs has not read a class page for CHEM C138 in any term it holds, so it cannot say what comes before it.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Springs
Ran in 3 of the last 4 Springs.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, three hours; discussion, one hour. Requisites: courses 30A, 30B, 30C, 153A. Covers fundamental chemical logic and enzyme mechanisms involved in biosynthesis of natural products. Discussion of major classes of natural product including polyketides, nonribosomal peptides, terpenes, alkaloids. Emphasis on biosynthetic logic used by nature to form complex molecules. Discussion of several important enzyme families in context of biosynthesis, including assembly-line megasynthases, group transferases, oxidoreductases, etc. Historical account of natural product isolation and characterization, as well as modern account of synthetic biology and genome based efforts that are used in discovery of new natural products. Includes extensive survey of scientific literature in format of presentations and discussions. Concurrently scheduled with course C238. Letter grading.
Sections in Spring 2027
From the people who took it
Student reviews
What taking CHEM C138 was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
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