These mice express Cre-recombinase under the Glp1r promoter [30] (MGI ID: 5755096). Two knock-in Glp1rCre models exist with IRES-Cre knocked-in downstream of the Glp1r gene (i.e. after the stop codon) [31, 55] (JAX stock no. 029283). Following breeding with animals possessing LoxP...