Sequence Variant Nomenclature This website clearly explains what codes like NG_012232.1(NM_004006.2):c.93+1G>T and p.Trp24Cys mean. Ensembl This website has good tools, such as a variant effect predictor. It's more for those with a (bio)informatics background. ClinVar A public archive of the relationships between gene variants and diseases, with supporting evidence. OMIM An online catalog of human genes and genetic disorders.