<prompt> Adenosine receptor stability is because of extensive disulfide bonds formed between:CysteineMethionineArginineAlanine  <response>: Disulfide bonds can only be formed between one amino acid i.e. cysteine, as it has sulfhydryl group -SH. Two cysteine gets joined to form cystine having disulfide bond see fig. It a strong covalent bond. 