PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 11356312-1 2001 Tryptophan substitutions were made in the second transmembrane domain of the gamma-aminobutyric acid(A) (GABAA) receptor alpha and beta subunits and the resulting mutant receptors, containing alpha2(S270W) and/or beta1 (S265W), were expressed in Xenopus oocytes. Tryptophan 0-10 MGC75582, possible similarity to act2 S homeolog Xenopus laevis 121-126