AfGcHK, Anaeromyxobacter sp. Fw109-5 GcHK; AsFRMF, Ascaris suum FRMF-amide receptor; AvGReg, Azotobacter vinilandii Greg; BpGReg, Bordetella pertussis Greg; BsHemAT, Bacillus subtilis HemAT; CCS, collision cross section; CIU, collision-induced unfolding; CMC, critical micelle concentration; CV, cyclic voltammetry; CeGLB26, Caenorhabditis elegans globin 26; CeGLB33, Caenorhabditis elegans globin 33; CeGLB6, Caenorhabditis elegans globin 6; DDM, n-dodecyl-ß-d-maltoside; DPV, differential pulse voltammetry; EcDosC, Escherichia coli Dos with DGC activity; FMRF, H-Phe-Met-Arg-Phe-NH2 neuropeptide; GCS, globin-coupled sensor; GD, globin domain; GGDEF, Gly-Gly-Asp-Glu-Phe motive; Gb, globin; Geobacter sulfurreducens; GintHb, hemoglobin from Gasterophilus intestinalis; Globin-coupled sensor; GsGCS, Geobacter sulfurreducens GCS; GsGCS162, GD of GsGCS; IM-MS, ion mobility-mass spectrometry; LmHemAC, Leishmania major HemAC; MaPgb, Methanosarcina acetivorans protoglobin; MtTrHbO, Mycobacterium tuberculosis truncated hemoglobin O; NH4OAc, ammonium acetate; OG, n-octyl-ß-d-glucopyranoside; PDE, phosphodiesterase; PcMb, Physether catodon myoglobin; PccGCS, Pectobacterium carotivorum GCS; PsiE, phosphate-starvation-inducible E; RR, resonance Raman; SCE, saturated calomel electrode; SHE, standard hydrogen electrode; SaktrHb, Streptomyces avermitilis truncated hemoglobin-antibiotic monooxygenase; SwMb, myoglobin from sperm whale; TD, Transmitter domain; TmD, Transmembrane domain; Transmembrane domain; Transmembrane-coupled globins; mNgb, mouse neuroglobin