Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Akwai matakai masu yawa na tsarin metabolism. A cikin tsari na ciki, hanyar metabolism tana tsara kanta don amsawa ga canje-canje a cikin matakan substrates ko samfurori; alal misali, raguwa a cikin adadin samfurin zai iya ƙara yawan ruwa ta hanyar hanya don ramawa. Wannan nau'in tsari sau da yawa ya haɗa da tsarin allosteric na ayyukan enzymes da yawa a cikin hanyar. Sarrafawa ta waje ta ƙunshi tantanin halitta a cikin kwayar halitta mai yawa wanda ke canza metabolism dinsa don amsa sigina daga wasu ƙwayoyin. Wadannan sigina yawanci suna cikin nau'ikan manzanni masu narkewa kamar su hormones da abubuwan haɓaka kuma ana gano su ta hanyar takamaiman masu karɓa a farfajiyar tantanin halitta. Wadannan sigina ana watsa su a cikin tantanin halitta ta hanyar tsarin manzo na biyu wanda sau da yawa ya haɗa da phosphorylation na sunadarai. Misali mai kyau wanda aka fahimta na sarrafawa na waje shine tsarin glucose metabolism ta hanyar hormone insulin. Ana samar da insulin ne a yayin da aka samu hauhawar glucose a cikin jini. Haɗin hormone zuwa masu karɓar insulin akan ƙwayoyin cuta sannan yana kunna cascade na protein kinases wanda ke sa ƙwayoyin cuta su ɗauki glucose kuma su canza shi zuwa ƙwayoyin ajiya kamar su fatty acid da glycogen. Ana sarrafa metabolism na glycogen ta hanyar aikin phosphorylase, enzyme wanda ke rushe glycogen, da glycogen synthase, enzyme wanda ke yin shi. Wadannan enzymes ana tsara su a cikin hanyar da ta dace, tare da phosphorylation yana hana glycogen synthase, amma yana kunna phosphorylase. Insulin yana haifar da haɗin glycogen ta hanyar kunna furotin phosphatases da samar da raguwa a cikin phosphorylation na waɗannan enzymes.  Tambaya: Mene ne yawanci ya haɗa da irin wannan tsari?
allosteric tsari na ayyukan enzymes da yawa a cikin hanyar