Genetics Home Reference (GHR) provides free access to consumer-friendly information on medical genetics to patients and their family members, health care professionals, and the public. The site offers summaries for a broad range of inherited conditions or disorders caused by gene alterations. Each condition summary includes the causes, available genetic testing, and links to summaries on related genes. Descriptions of genes include gene names and their synonyms, normal function, chromosome location, and an explanation of any disorder-causing mutations. Additionally, GHR provides a genetics glossary, help on understanding genetics, and links to many useful consumer, support, and research organizations. GHR is a service of the U.S. National Library of Medicine at the National Institutes of Health.

The eMedicine point-of-care clinical reference features up-to-date, searchable, peer-reviewed medical articles organized in specialty-focused textbooks, and is continuously updated with practice-changing evidence culled daily from the medical literature.

The adrenoleukodystrophy database serves as a catalog for ABCD1 mutations and provides information on X-ALD.

A place in cyberspace for biology, health and life science teachers and learners.

Distilled, authoritative and up-to-date information for researchers on scientific, technical and medical topics. SciTopics pages are written by scientific experts, facilitate knowledge sharing, and provide the latest and most relevant journal and web results.

Extensive knowledge base of medical information on symptoms, diagnosis, and misdiagnosis of more than 20,000 medical conditions. Research causes of your symptoms or research treatments for diseases.