The provided content includes a list of 30 scientific references, each describing a study or paper related to molecular biology, crystallography, and protein structure. The first 13 references describe studies on the structure of various proteins and their receptors, including human growth hormone, interferon-gamma, erythropoietin (EPO), and interleukin-1 (IL-1). These studies focus on the structural analysis of these proteins and their interactions with their respective receptors. The remaining references describe methods and software used in crystallography, such as automated processing of rotation diffraction data, molecular replacement, and software for protein crystallography. The content also includes an erratum for a Nature article on the production of viable offspring from mammalian cells, noting an error in the figure images. Additionally, there is a section on copyright information, warning against unauthorized photocopying of the publication. The authors acknowledge the contributions of J. A. Malikayil, T. Pelton, and A. Bateman, and provide contact information for correspondence. The coordinates of the studied structures will be deposited in the Brookhaven Protein Data Bank after one year.The provided content includes a list of 30 scientific references, each describing a study or paper related to molecular biology, crystallography, and protein structure. The first 13 references describe studies on the structure of various proteins and their receptors, including human growth hormone, interferon-gamma, erythropoietin (EPO), and interleukin-1 (IL-1). These studies focus on the structural analysis of these proteins and their interactions with their respective receptors. The remaining references describe methods and software used in crystallography, such as automated processing of rotation diffraction data, molecular replacement, and software for protein crystallography. The content also includes an erratum for a Nature article on the production of viable offspring from mammalian cells, noting an error in the figure images. Additionally, there is a section on copyright information, warning against unauthorized photocopying of the publication. The authors acknowledge the contributions of J. A. Malikayil, T. Pelton, and A. Bateman, and provide contact information for correspondence. The coordinates of the studied structures will be deposited in the Brookhaven Protein Data Bank after one year.