Homework
Weekly homework submissions:
Week 1 HW: Principles and Practices
Living Modified Organism(LMO) Cotton Textiles That Maintain Hygiene and Emit Pleasant Scents This application envisions a cotton-based textile integrated with genetically engineered microorganisms that are designed to function stably on the fabric surface. These microorganisms would metabolize organic compounds derived from human sweat and skin debrisโsuch as fatty acids, ammonia, and keratin degradation byproductsโthereby maintaining hygiene and reducing odor formation. Unlike conventional approaches that rely on antimicrobial chemicals or synthetic fragrances, this system would operate as an engineered living material, in which biological activity is deliberately programmed to occur only within a non-natural environment (the textile itself). Conventional perfumes and detergents repeatedly introduce chemically stable, exogenous compounds that may unintentionally interfere with human endocrine systems or disrupt the skin microbiome through persistent and non-selective exposure.
Week 2 HW: DNA Read, Write and Edit
Part 0: Basics of Gel Electrophoresis #S.S: ๋ถํธ์บ ํ์ Wk2 ์์ ์ ๋ค์ ํ, ๊ณผ์ ๋ฅผ ํ์ธํ์ง๋ง ์ ํํ ๊ฐ๋ ์ ๋ฆฌ๊ฐ ์๋์ด ์์ด์ ๋ญ ์งํํ๋์ง ์ดํดํ๊ธฐ ์ด๋ ค์ ๋ค. ๋ฐ๋ผ์ ChatGPT๋ฅผ ํ์ฉ, it became clearer once I understood the concept of restriction enzyme(molecular scissors) and gel electrophoresis(DNA size filter). Prompt: "restriction enzyme biology ์ gel electrophoresis์ ๋ํด์ ์์ฃผ ๊ฐ๋จํ ์ค๋ช ํด์ค" ๋ฅผ ํตํด ๋ค์๊ณผ ๊ฐ์ ๋ต๋ณ์ ์ป์๋ค. 1. Restriction enzyme (์ ํํจ์) biology ์ ํํจ์๋ ํน์ ํ DNA ์ผ๊ธฐ์์ด์ ์ธ์ํด์ ๊ทธ ์ง์ ์ ์๋ฅด๋ ํจ์์ ๋๋ค. ์๋๋ ๋ฐํ ๋ฆฌ์์ ๋ฐฉ์ด ์์คํ ์ผ๋ก, ์นจ์ ํ ๋ฐ์ด๋ฌ์ค DNA๋ฅผ ์๋ผ ํ๊ดดํฉ๋๋ค. ๊ฐ ํจ์๋ ๊ณ ์ ํ ์ธ์ ์์ด(์: GAATTC)์ ๊ฐ์ง๋ฉฐ, ๊ทธ ์์น์์ DNA๋ฅผ ์ ํํ ์ ๋จํฉ๋๋ค. ์ด ํน์ฑ ๋๋ถ์ ๋ถ์์๋ฌผํ์์๋ DNA๋ฅผ ์ํ๋ ์กฐ๊ฐ์ผ๋ก ์๋ฅด๋ ๋๊ตฌ๋ก ์ฌ์ฉ๋ฉ๋๋ค. 2. Gel electrophoresis (๊ฒ ์ ๊ธฐ์๋) ๊ฒ ์ ๊ธฐ์๋์ DNA ์กฐ๊ฐ์ ํฌ๊ธฐ๋ณ๋ก ๋ถ๋ฆฌํ๋ ์คํ ๋ฐฉ๋ฒ์ ๋๋ค. DNA๋ ์์ ํ๋ฅผ ๋ ๋ฏ๋ก ์ ๊ธฐ๋ฅผ ๊ฑธ๋ฉด ์๊ทน ๋ฐฉํฅ์ผ๋ก ์ด๋ํฉ๋๋ค. ์์ DNA ์กฐ๊ฐ์ผ์๋ก ๊ฒ ์์ ๋ ๋นจ๋ฆฌ, ๋ ๋ฉ๋ฆฌ ์ด๋ํฉ๋๋ค. ๊ฒฐ๊ณผ์ ์ผ๋ก DNA ์กฐ๊ฐ๋ค์ด ๋ฐด๋ ํํ๋ก ๋ํ๋๋ฉฐ, ํฌ๊ธฐ๋ฅผ ๋น๊ตยทํ์ธํ ์ ์์ต๋๋ค. One-line summary -Restriction enzymes: molecular scissors that cut DNA at specific sequences -Gel electrophoresis: a method to separate DNA fragments by size Part 1: Benchling & In-silico Gel Art #S.S: Benchling is such a cool platform that we can edit DNA in-silico. I uploaded โLambda DNA.txtโ and managed digest by choosing each enzyme that cuts DNA strand. My initial thought was to see the ladder that each enzyme makes to decide which figure/shape Iโd like on my artwork, but the shown result were not a single bar but of multiple layers. โ at this stage, I have no idea how to compose an gel art.
A group HW: Design cell-free RNA biosensors RNA toehold switch๊ฐ ์๋ํ๋ ์๋ฆฌ๋ฅผ recitation์์ Ana๊ฐ ์ค๋ช ํด ์ฃผ์๋๋ฐ, ๋๋ ์ฐ์ mRNA๊ฐ ๋จ๋ฐฑ์ง๋ก translation๋๋ ๊ธฐ์ ์ ์ดํดํ๊ณ ๋์ ์ด๋ฐ biosensor์ ๊ธฐ๋ฅ์ ์ดํดํ ์ ์์๋ค. mRNA์ ribosome์ด ์์ ๊ฒฐํฉํ๋ค. ์ฐพ์๋ค๋๋ค๊ธฐ ๋ณด๋ค๋ cell๋ด์์ ์์ ๋กญ๊ฒ ๋ ๋ค๋๋ ribosome์ด ์ถฉ๋ํ์ฌ ๊ฒฐํฉํ๋ ๊ฒ์ ๊ฐ๊น๋ค๊ณ . Eukaryotes์ ๊ฒฝ์ฐ๋ rough endoplasmic reticulum(RER, ์ธํฌ์๊ธฐ๊ดorganelle)์ ๊ฑฐ์น ์ด ๋ณด์ด๋๋ก ribosome๋ค์ด ๋ถ์ด์์ด์ ๋จ๋ฐฑ์ง์ ์์ฐ, ๋ฐ๋ฉด์ Prokaryotes, ์ฆ, bacteria์ ๊ฒฝ์ฐ ribosome์ free-floating ์ํ๋ก๋ง cytoplasm(์ธํฌ์ง)์ ์กด์ฌ.