2JM4, 2M7P59350381489ENSG00000171509ENSMUSG00000034009Q9HBX9Q6R6I7NM_001253733NM_021634NM_001363776NM_212452NP_001240662NP_067647NP_001350705NP_997617Relaxin/insulin-like family peptide receptor 1, also known as RXFP1, is a human G protein coupled receptor that is one of the relaxin receptors.2jm4: The solution NMR structure of the relaxin (RXFP1) receptor LDLa module. Relaxin/insulin-like family peptide receptor 1, also known as RXFP1, is a human G protein coupled receptor that is one of the relaxin receptors. This article incorporates text from the United States National Library of Medicine, which is in the public domain.