Table 1.

Amino acid sequence and distribution of apelin and elabela isoforms.

Identity	Amino acid sequence	Expressed tissue
Apelin-77 Apelin-36 Apelin-17 Pyr-apelin-13 Apelin-13	MNLRLCVQALLLLWLSLTAVCGGSLMPLPDGNGLEDGNHLVQRGSRNGP GPWQGGRRKFRRQRPRLSHKGPMPF LVQPRGSRNGPGPWQGGRRKFRRQRPRLSHKGPMPF FRRQRPRLSHKGPMPF ∗ERPRLSHKGPMPF RPRLSHKGPMPF	Vascular endothelium Central nervous system Adipose tissue Mammary gland Heart, lung, kidney Limbs, retina, liver, skin
Elabela-54 Elabela-32 Elabela-21 Elabela-11	MRFQQFLFAFFIFIMSLLLISGQRPVNLTMRRKLRKHNCLQRRCMPLHSRVPFP QRPVNLTMRRKLRKHNCLQRRCMPLHSRVPFP RKHNCLQRRCMPLHSRVPFP MPLHSRVPFP	Pluripotent stem cells Heart, lung Placenta Kidney

^∗E represents pyroglutamate (Pyr).