title: Developing cell biology.
abstract: Experiments in Xenopus embryo extracts reveal that changes in cellular biochemistry cause mitotic spindles to decrease in size over the course of early development.
authors: is at the  School of Engineering and Applied Sciences, the Department of Molecular and Cellular Biology, and the Center for Systems Biology , at  Harvard University ,  United States dan.needleman@gmail.com.
authors: Daniel
authors: D
authors: Needleman
mesh_terms: D000818:Animals; D008941:Spindle Apparatus; D014981:Xenopus / Q000196:embryology*
keywords: Xenopus; embryogenesis; intracellular scaling; kif2a; microtubule; mitosis; mitotic spindle