NCYM, or MYCN opposite strand, is a human gene encoded by MYCNOS. It may also be known as: N-cym protein; N-myc opposite strand; MYCN antisense RNA 1; DNA binding transcriptional activator; MYCN-AS1; N-CYM; NYCM. The encoded protein has an amino acid length of 109 and a mass of 11.7 kDa. Other isoforms may exist. Homologs of this gene exist in other organisms, including: Mouse.