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 debrisโ€”such as fatty acids, ammonia, and keratin degradation byproductsโ€”thereby 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: ๋ถ€ํŠธ์บ ํ”„์™€ Wk2 ์ˆ˜์—…์„ ๋“ค์€ ํ›„, ๊ณผ์ œ๋ฅผ ํ™•์ธํ–ˆ์ง€๋งŒ ์ •ํ™•ํ•œ ๊ฐœ๋… ์ •๋ฆฌ๊ฐ€ ์•ˆ๋˜์–ด ์žˆ์–ด์„œ ๋ญ˜ ์ง„ํ–‰ํ•˜๋Š”์ง€ ์ดํ•ดํ•˜๊ธฐ ์–ด๋ ค์› ๋‹ค. ๋”ฐ๋ผ์„œ ChatGPT๋ฅผ ํ™œ์šฉ, 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— ๋Œ€ํ•ด์„œ ์•„์ฃผ ๊ฐ„๋‹จํžˆ ์„ค๋ช…ํ•ด์ค˜" ๋ฅผ ํ†ตํ•ด ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๋‹ต๋ณ€์„ ์–ป์—ˆ๋‹ค. 1. Restriction enzyme (์ œํ•œํšจ์†Œ) biology ์ œํ•œํšจ์†Œ๋Š” ํŠน์ •ํ•œ DNA ์—ผ๊ธฐ์„œ์—ด์„ ์ธ์‹ํ•ด์„œ ๊ทธ ์ง€์ ์„ ์ž๋ฅด๋Š” ํšจ์†Œ์ž…๋‹ˆ๋‹ค. ์›๋ž˜๋Š” ๋ฐ•ํ…Œ๋ฆฌ์•„์˜ ๋ฐฉ์–ด ์‹œ์Šคํ…œ์œผ๋กœ, ์นจ์ž…ํ•œ ๋ฐ”์ด๋Ÿฌ์Šค DNA๋ฅผ ์ž˜๋ผ ํŒŒ๊ดดํ•ฉ๋‹ˆ๋‹ค. ๊ฐ ํšจ์†Œ๋Š” ๊ณ ์œ ํ•œ ์ธ์‹ ์„œ์—ด(์˜ˆ: GAATTC)์„ ๊ฐ€์ง€๋ฉฐ, ๊ทธ ์œ„์น˜์—์„œ DNA๋ฅผ ์ •ํ™•ํžˆ ์ ˆ๋‹จํ•ฉ๋‹ˆ๋‹ค. ์ด ํŠน์„ฑ ๋•๋ถ„์— ๋ถ„์ž์ƒ๋ฌผํ•™์—์„œ๋Š” DNA๋ฅผ ์›ํ•˜๋Š” ์กฐ๊ฐ์œผ๋กœ ์ž๋ฅด๋Š” ๋„๊ตฌ๋กœ ์‚ฌ์šฉ๋ฉ๋‹ˆ๋‹ค. 2. Gel electrophoresis (๊ฒ” ์ „๊ธฐ์˜๋™) ๊ฒ” ์ „๊ธฐ์˜๋™์€ DNA ์กฐ๊ฐ์„ ํฌ๊ธฐ๋ณ„๋กœ ๋ถ„๋ฆฌํ•˜๋Š” ์‹คํ—˜ ๋ฐฉ๋ฒ•์ž…๋‹ˆ๋‹ค. DNA๋Š” ์Œ์ „ํ•˜๋ฅผ ๋ ๋ฏ€๋กœ ์ „๊ธฐ๋ฅผ ๊ฑธ๋ฉด ์–‘๊ทน ๋ฐฉํ–ฅ์œผ๋กœ ์ด๋™ํ•ฉ๋‹ˆ๋‹ค. ์ž‘์€ DNA ์กฐ๊ฐ์ผ์ˆ˜๋ก ๊ฒ” ์†์„ ๋” ๋นจ๋ฆฌ, ๋” ๋ฉ€๋ฆฌ ์ด๋™ํ•ฉ๋‹ˆ๋‹ค. ๊ฒฐ๊ณผ์ ์œผ๋กœ DNA ์กฐ๊ฐ๋“ค์ด ๋ฐด๋“œ ํ˜•ํƒœ๋กœ ๋‚˜ํƒ€๋‚˜๋ฉฐ, ํฌ๊ธฐ๋ฅผ ๋น„๊ตยทํ™•์ธํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. 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 โ€˜Lambda 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 Iโ€™d 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.

  • Week 3 HW: Lab Automation

    A group HW: Design cell-free RNA biosensors RNA toehold switch๊ฐ€ ์ž‘๋™ํ•˜๋Š” ์›๋ฆฌ๋ฅผ recitation์—์„œ Ana๊ฐ€ ์„ค๋ช…ํ•ด ์ฃผ์—ˆ๋Š”๋ฐ, ๋‚˜๋Š” ์šฐ์„  mRNA๊ฐ€ ๋‹จ๋ฐฑ์งˆ๋กœ translation๋˜๋Š” ๊ธฐ์ „์„ ์ดํ•ดํ•˜๊ณ ๋‚˜์„œ ์ด๋Ÿฐ biosensor์˜ ๊ธฐ๋Šฅ์„ ์ดํ•ดํ•  ์ˆ˜ ์žˆ์—ˆ๋‹ค. mRNA์— ribosome์ด ์™€์„œ ๊ฒฐํ•ฉํ•œ๋‹ค. ์ฐพ์•„๋‹ค๋‹Œ๋‹ค๊ธฐ ๋ณด๋‹ค๋Š” cell๋‚ด์—์„œ ์ž์œ ๋กญ๊ฒŒ ๋– ๋‹ค๋‹ˆ๋˜ ribosome์ด ์ถฉ๋Œํ•˜์—ฌ ๊ฒฐํ•ฉํ•˜๋Š” ๊ฒƒ์— ๊ฐ€๊น๋‹ค๊ณ . Eukaryotes์˜ ๊ฒฝ์šฐ๋Š” rough endoplasmic reticulum(RER, ์„ธํฌ์†Œ๊ธฐ๊ด€organelle)์— ๊ฑฐ์น ์–ด ๋ณด์ด๋„๋ก ribosome๋“ค์ด ๋ถ™์–ด์žˆ์–ด์„œ ๋‹จ๋ฐฑ์งˆ์„ ์ƒ์‚ฐ, ๋ฐ˜๋ฉด์— Prokaryotes, ์ฆ‰, bacteria์˜ ๊ฒฝ์šฐ ribosome์€ free-floating ์ƒํƒœ๋กœ๋งŒ cytoplasm(์„ธํฌ์งˆ)์— ์กด์žฌ.