Kaihanga Tāpiri Kai TianJia L-Methionine
Ko te Methionine he pūhui waro, ko tētahi o ngā waikawa amino nui e hanga ana i te tinana tangata. Ko tōna tauira ngota ko C5H11O2NS, he mahi whatu tōna, ā, e whai wāhi ana ki te hanga pūmua.
Nā te mea kāore e taea te whakaputa mai i roto, me tiki mai i waho. Mēnā kāore he methionine, ka āraia te hanganga pūmua i roto i te tinana, ka pā kino ki te tinana. Ko te nui rawa o te waikura o ngā lipid membrane i puta mai i ngā rauropi kore-hāora i roto i te tinana te take o ngā momo kino ki te tinana. Ka taea e ngā lipid peroxides te kino i ngā membrane lysosomal tuatahi me te tuarua, ka tukuna te phosphatase waikawa kei roto i te lysosome hei whākōkī hydrolytic, ka pā kino ki ngā whekau nui pērā i ngā pūtau me ngā membrane mitochondrial. Ka whawhai te Methionine ki ēnei kino mā roto i ngā ara rerekē.
Ka whakamahia whānuitia hei tāpiringa kai.He rite tonu te pānga ā-tinana o te L-methionine ki te pānga o te L-methionine, engari he iti te utu (ka hangaia te momo-L mai i te momo DL), nō reira ka whakamahia whānuitia te DL methionine. Ka kitea ngā waikawa amino kua whakawhāitihia i roto i ngā kai tipu pēnei i te ōti, te rai, te raihi, te kānga, te witi, te paraoa pīnati, te pīni soya, te rīwai, te pīnihi, me ētahi atu. Tāpirihia ki ngā kai o runga ake nei hei whakapai ake i te taurite o ngā waikawa amino. Ka rerekē te hiahia i runga i te kai o te cystine. Ko te hiahia mō ngā tāne pakeke he 1.1g/d.
He hononga te reka o ngā kōura moana ki te methionine, he hononga te reka o ngā kōura moana ki te glycine me te alanine, he hononga te kawa ki te valine, ā, he hononga te hou ki te glutamate. Nō reira, ka taea te hanga i ēnei waikawa amino hei mea kakara.
Kei te whakamahia tonutia mō te werohanga waikawa amino me ngā whakaritenga waikawa amino whānui.
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