Retinal Pigments; Rhodopsin; Sulfhydryl Compounds; Alkylation; Amino Acids/analysis; Animals; Binding Sites; Carbon Radioisotopes; Cattle; Centrifugation, Density Gradient; Chloromercuribenzoates; Chromatography, Gel; Cold Temperature; Darkness; Drug Stability; Hot Temperature; Iodoacetates; Kinetics; Light; Oxidation-Reduction; Photochemistry; Photoreceptor Cells/analysis; Protein Binding; Quaternary Ammonium Compounds; Retina/analysis; Rhodopsin/analysis; Rhodopsin/isolation & purification; Spectrophotometry, Ultraviolet; Sulfhydryl Compounds/analysis; Time Factors