The International Journal of Molecular Sciences (ISSN 1422-0067; CODEN: IJMCFK; ISSN 1661-6596 for printed edition) provides an advanced forum for molecular studies in biology and chemistry, with a strong emphasis on molecular biology and molecular medicine. Our aim is to provide rigorous peer review and enable rapid publication of cutting-edge research to educate and inspire the scientific community worldwide. We encourage scientists to publish their experimental, theoretical, and computational results in as much detail as possible, in a regular section (https://www.mdpi.com/journal/ijms/sections) or in a Special Issue (https://www.mdpi.com/journal/ijms/special_issues). Therefore, there is no restriction on the length of the papers or the number of electronic multimedia and supplementary files. For all articles, the full experimental details must be provided so that the results can be reproduced. Electronic files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material (including animated pictures, videos, interactive Excel sheets, software executables and others). Manuscript categories: original scientific research articles, comprehensive reviews, communications, case reports, letters, commentaries, editorials, etc. In the International Journal of Molecular Sciences, molecules are the object of study; among those studies, we find: fundamental theoretical problems of broad interest in biology, chemistry and medicine; breakthrough experimental technical progress of broad interest in biology, chemistry and medicine; and application of the theories and novel technologies to specific experimental studies and calculations.