... also weak interactions : formaldehyde cross-linking [ 17 ] and proximity biotinylation using promiscuous biotin protein ligase BirA* [biotin protein ligase BirA mutant (R118G); EC 6.3.4.15] (BioID; [ 18 ]), both in combination with stable isotope labeling with amino acids in cell culture (SILAC) [ 19...

... internalization, although both were full agonists. U50,488H induced higher degrees of phosphorylation than etorphine at Ser 356 /Thr 357 , Thr 363 and Ser 369 as determined by immunoblotting. Using SILAC (stable isotope labelling by amino acids in cell culture) and HPLC–MS/MS, we found that, compared with control...