Structural overview of CTRP3. (A) Two splice variants were identified and designated as CTRP3A and CTRP3B. (B) Organization of the CTRP3A and CTRP3B genes and proteins. The human CTRP3A gene is 25.3 kb in size, consists of six exons and five introns, and is located on chromosome 5p13. Exons 1, 2, 3, 4, 5, and 6 of the CTRP3A gene are 171, 112, 155, 130, 100, and 2885 bp in size, respectively. The size of each intron is also indicated. Exon 1B (gray square) contains a 219-nucleotide sequence found in CTRP3B cDNA, coding for an extra 73 amino acid residues. A potential Nlinked glycosylation site is circled. The consensus splice donors are shown in italic type. This figure was originally published in The Journal of Biological Chemistry (51) and image reproduced according to the copyright policy of the ASBMB. © the American Society for Biochemistry and Molecular Biology.