The Protein Structure Initiative (PSI), funded by the U.S. National Institute of General Medical Sciences (NIGMS), part of the National Institutes of Health (NIH), has among its aim to determine three-dimensional protein structures and to develop techniques for use in structural biology, including for membrane proteins.
Protein Structure Initiative (PSI), didanai oleh National Institute of General Medical Sciences Amerika Serikat (NIGMS), bagian dari Institut Kesehatan Nasional, di tengah tujuannya untuk menentukan struktur protein tiga dimensi dan mengembangkan teknik untuk penggunaan dalam biologi struktur, termasuk untuk protein membran.