biology

Martin Chalfie

Martin Chalfie is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Martin Chalfie rather than just read about it. In short: Martin Lee Chalfie (born January 15, 1947) is an American scientist. He is University Professor at Columbia University.

Key takeaways

Martin Chalfie belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Martin Chalfie to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Martin Chalfie from memory before moving on to harder problems.

Reference excerpt

Martin Lee Chalfie (born January 15, 1947) is an American scientist. He is University Professor at Columbia University. He shared the 2008 Nobel Prize in Chemistry along with Osamu Shimomura and Roger Y. Tsien "for the discovery and development of the green fluorescent protein, GFP". He holds a PhD in neurobiology from Harvard University.

Early life and education

Chalfie grew up in Chicago, Illinois, son of the guitarist Eli Chalfie (1910–1996) and owner of an apparel store Vivian Chalfie (née Friedlen, 1913–2005). His maternal grandfather, Meyer L. Friedlen, immigrated to Chicago from Moscow at an early age; his paternal grandparents, Benjamin and Esther Chalfie, came to Cincinnati from Brest-Litovsk and are Jewish. He matriculated at Harvard University in 1965, intending to be a math major, but he switched to biochemistry because it combined his interests in chemistry, math, and biology. He spent the summer after his junior year working in the laboratory of Klaus Weber at Harvard, but "It was so disheartening to completely fail that I decided I shouldn't be in biology." As a result, in his senior year, he completed his major and took courses in law, theater, and Russian literature. He also competed on the swim team at Harvard and was named captain in his senior year. At the time, swimming coach Bill Brooks said, "Marty will make an excellent captain because he has the admiration of the entire team." As captain, he won the Harold S. Ulen trophy, awarded "to a senior on the Harvard team who best demonstrates those qualities of leadership, sportsmanship, and team cooperation as exemplified by Harold S. Ulen." Following the announcement of Chalfie's Nobel award, his freshman-year roommate observed of Chalfie, "He would always identify himself as a swimmer." After graduating in 1969, he worked at a variety of temporary jobs, such as selling dresses for his parents' dress manufacturing business in Chicago and teaching at Hamden Hall Country Day School in Hamden, Connecticut. In the summer of 1971, his research at the laboratory of Jose Zadunaisky at Yale University resulted in his first publication. With revived confidence, he returned to Harvard for graduate studies under Robert Perlman, and received his PhD in 1977.

Career and research Chalfie conducted his postdoctoral research at the Laboratory of Molecular Biology (LMB) with Sydney Brenner and John Sulston, and the three published a paper in 1985 on "The Neural Circuit for Touch Sensitivity in C. elegans". Chalfie then left the LMB in 1982 to join the faculty of Columbia University in the department of biological sciences and continued to study C. elegans touch mutants. He married Tulle Hazelrigg. She later joined him on the faculty of Columbia University. She gave him permission to cite her unpublished research in his seminal Science paper "Green Fluorescent Protein as a Marker for Gene Expression" on condition that he made coffee, cooked, and emptied the garbage nightly for a month. Chalfie and his wife had a daughter, Sarah, in July 1992. Chalfie was elected to the National Academy of Sciences in 2004. He slept through the phone call from the Nobel Prize Committee. When he woke up, he knew the prize would have been announced already, so he said "Okay, who's the schnook that got the Prize this time?" And so he opened up his laptop, got to the Nobel Prize site and found out that he was the schnook! In 2015, Chalfie signed the Mainau Declaration 2015 on Climate Change on the final day of the 65th Lindau Nobel Laureate Meeting. The declaration was signed by a total of 76 Nobel Laureates and handed to then-President of the French Republic, François Hollande, as part of the successful COP21 climate summit in Paris. Chalfie's lab uses the nematode ''C. elegans'' to investigate aspects of nerve cell development and function. The developmental, anatomical, genetic, and molecular information available for ''C. elegans'' makes it a well-studied model organism for these research areas. He has published over 100 papers of which at least 25 have over 100 citations. He traces his work on green fluorescent protein to a 1988 seminar from Paul Brehm about bioluminescent organisms, which led to some crucial experiments in 1992, detailed in his paper "Green fluorescent protein as a marker for gene expression", which is among the 20 most-cited papers in the field of Molecular Biology & Genetics. Chalfie won a Golden Goose Award for this work in 2012. He received an honorary degree in physics from the University of Parma on July 4, 2023.

Awards and honours 2003: Elected to the American Academy of Arts and Sciences 2004: Elected to the National Academy of Sciences 2006: Lewis S. Rosenstiel Award for Distinguished Work in Basic Medical Science, Brandeis University (shared with Roger Y. Tsien) 2007: Elected Fellow of the American Association for the Advancement of Science 2008: Nobel Prize in Chemistry (shared with Osamu Shimomura and Roger Y. Tsien) for the discovery and development of green fluorescent protein (GFP) 2008: E. B. Wilson Medal, American Society for Cell Biology (shared with Roger Y. Tsien) 2009: Elected to the Institute of Medicine 2012: Golden Goose Award 2023: Honorary degree in physics, University of Parma

Illustrations

Worked examples

Example 1 — a first encounter with Martin Chalfie

Start with the simplest possible case. Write down what Martin Chalfie claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Martin Chalfie before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Martin Chalfie ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Martin Chalfie

In research: Martin Chalfie appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Martin Chalfie in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Martin Chalfie is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1947 births, American Nobel laureates, American fellows of the Royal Society, so understanding it makes those chapters shorter.
In everyday life: Look for Martin Chalfie outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Martin Chalfie in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Martin Chalfie means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Martin Chalfie out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Martin Chalfie in simple terms?

Martin Lee Chalfie (born January 15, 1947) is an American scientist. He is University Professor at Columbia University.

Why does Martin Chalfie matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Martin Chalfie?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Martin Chalfie.