tokens: In contrast , receptor / G protein coupling appeared unaffected by expression of loop 3i domains derived from two receptors coupled to G ( i / o ) proteins ( M2Ach-muscarinic and alpha2A-adrenergic receptors ) .
folded_tokens: in contrast , receptor / g protein coupling appear unaffected by expression of loop 3us domain derive from two receptor couple to g ( i / o ) protein ( m2ach-muscarinic and alpha2a-adrenergic receptor ) .