9:54 AM Sun Oct 17* 73%DonePrelab 7 - Tagged (2 of 64)3. Bacterium Z had the lab results below. What can you tell me about the protein metabolism of this bacterium?PeptonePhenylalanineGelatinUreaTubesIronagarSlantsSlantsDeepsResultsolidFushiaNo colorBlackeningat butt oftubeOthernonenonenonenonepossibleresultsOthernonenonenonenonepossibleresultsWhich protein and amino acids can it catabolize, among gelatin, urea, phenylalanine, sulfur-containing amino acids, andtryptophan?Can it desulfur proteins?Can it produce NH3 from the amino acid phenylalanine?4. Bacterium Q had the lab results below. What can you tell me about the protein metabolismof this bacterium?PeptonePhenylalanineSlantsGelatinUreaTubesIronagarSlantsDeepsResultsolidFushiaNo coloryellowOthernonenonenonenonepossibleresultsOthernonenonenonenonepossibleresultsWhich protein and amino acids can it catabolize, among gelatin, urea, phenylalanine, sulfur-containing amino acids andtryptophan?Can it desulfur proteins?Can it produce NH3 from the amino acid phenylalanine? 9:54 AMDonePrelab 7 - Tagged (2 of 64)三:Prelab 7 - Protein CatabolismIn this lab we focus on another important group of metabolism processes: the breakdown of proteins and amino acids. Inthese labs we will utilize a series of media in tubes that differ in the protein for the bacteria to breakdown, and in the endproducts they can detect. There are a few new vocabulary terms. Proteolytic enzymes are enzymes that breakdown proteins,usually by first breaking apart the polypeptide into individual amino acids. Hydrolysis reaction is used to break apart thepeptide bond holding the amino acids in the polypeptide together. Hydrolysis is used to breakdown urea, a compoundproduced by the body from the destruction of proteins.Once broken down to individual amino acid, often the amine (NH2) functional group is broken off one end in a deaminationreaction, creating NH3. In a decarboxylation reaction the carboxyl group is removed, creating CO2. In a desulfurationreaction a sulfur is removed. Examples of these processes can be found in figures in the lab background information.1. The end product of protein metabolism is often ammonia, a base. What effect will this have on pH, will it go up or down?2. Another common end product, pyruvic acid. Into which metabolic pathway will the body use pyruvic acid as a substrateto produce ATP?To become familiar with the media before lab, please read both protein catabolism exercise background information. Inparticular pay attention to the figures. Similar to last lab, the table below summarizes the different metabolic tests. Usingthe table, interpret the results in the following questions. There are results to interpret on the back of this handout.PhenylalanineGelatinTubesPeptone IronDeepsUreaSlantsagarSlantsProtein orAmino Acid inGelatinUreaPhenylalaninePeptoneproteinmediaReagent addedin second periodNoneIron (III) chloride(Fe)nonenoneInitial colorno colororangeNo colorNone/YellowNegative resultsolidyellowno coloryellow(-)Meaning of -Sulfur amino acids notutililizedCan notNoDid not deaminateresultutilizeureasegelatinPositive resultliquidfushiagreenblackening at butt oftube(+)Meaning of +resultH2S produced fromsulfur amino acidsCatabolizedUreaseDeaminatedgelatinpresentphenylalanine

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Which protein and amino acids can it catabolize, among gelatin, urea, phenylalanine, sulfur-containing amino acias, and tryptophan? Can it desulfur proteins? Can it produce NH3 from the amino acid phenylalanine?