Sarah P. Gibbs

Sarah P. Gibbs (May 25, 1930 – September 25, 2014) She continued at Cornell completing a Master's program in zoology with a minor in education. Her first scientific position, post-Master's degree, was working as a technician for zoology professor Marcus Singer.

While at Harvard, Gibbs switched advisors, completing her PhD under the advisement of George Chapman, studying the pyrenoid structure in algae, as well as the ultrastructure of the chloroplast itself. In 1962, she published a paper titled "Nuclear envelope-chloroplast relationships in algae", detailing the unexpected discovery that in a number of algal classes the chloroplasts are surrounded by four, not two, membranes. Gibbs called the two extra membranes the outer envelope, but they were later named the chloroplast endoplasmic reticulum (ER) in a paper published by Ben Bouck in 1965.