- mRNA - mRNA is an intermediate molecule between DNA and protein. It is also referred to as a protein coding transcript. It includes UTR and coding sequences. It does not contain introns.
- ncRNA - These are transcripts that are not translated into proteins and are referred to as non-coding transcripts.
- lincRNA - This is a multiexonic non-coding RNA transcribed by RNA polymerase II (SO:0001463) that is longer than 200 nucleotides and are capped, polyadenylated and often spliced; these have been called long intervening ncRNAs or long intergenic ncRNAs.
- pre miRNA - The 60-70 nucleotide region remain after Drosha processing of the primary miRNA transcript, that folds back upon itself to form a hairpin structure.
- miRNA - Small, ~22-nt, RNA molecule that is the endogenous transcript of a miRNA gene. Micro RNAs are produced from precursor molecules (SO:0000647) that can form local hairpin structures, which ordinarily are processed (via the Dicer pathway) such that a single miRNA molecule accumulates from one arm of a hairpin precursor molecule. Micro RNAs may trigger the cleavage of their target molecules or act as translational repressors.
- piRNA - A small non coding RNA, part of a silencing system that prevents the spreading of selfish genetic elements
- rRNA - RNA that comprises part of a ribosome, and that can provide both structural scaffolding and catalytic activity.
- scRNA - Any one of several small cytoplasmic RNA molecules present in the cytoplasm and sometimes nucleus of a eukaryote.
- snRNA - A small nuclear RNA molecule involved in pre-mRNA splicing and processing.
- snoRNA - A snoRNA (small nucleolar RNA) is any one of a class of small RNAs that are associated with the eukaryotic nucleus as components of small nucleolar ribonucleoproteins. They participate in the processing or modifications of many RNAs, mostly ribosomal RNAs (rRNAs) though snoRNAs are also known to target other classes of RNA, including spliceosomal RNAs, tRNAs, and mRNAs via a stretch of sequence that is complementary to a sequence in the targeted RNA.
- tRNA - A transcript encoding a transfer RNA.
- antisense - Antisense RNA is RNA that is transcribed from the coding, rather than the template, strand of DNA. It is believed to be used in the regulation of the gene to which it belongs.
- pseudogenic transcript - These refer to transcripts expressed from a pseudogene where protein homology or genomic structure indicates pseudogene but presence of locus-specific transcripts indicates expression.
- polycistronic transcript - A transcript that contains the code for more than one gene product
- aberrant processed transcript - A transcript that has been processed "incorrectly", for example by the failure of splicing of one or more exons
- V-gene - An immunoglobulin variable chain gene
- transposable element - An intact, and therefore potentially, active transposon.
- disrupted domain - Otherwise viable coding region omitted from this alternatively spliced transcript because the splice variation affects a region coding for a protein domain
- transcript - A default type for transcripts used by ZFIN as a placeholder until a more definitive type is assigned.