Biological process

down regulation of L-serine hydro-lyase (adding homocysteine), down regulation of L-serine hydro-lyase (adding homocysteine; L-cystathionine-forming), down regulation of beta-thionase activity, down regulation of cystathionine beta-synthase activity, down regulation of methylcysteine synthase activity, down regulation of serine sulfhydrase activity, down regulation of serine sulfhydrylase activity, down-regulation of L-serine hydro-lyase (adding homocysteine), down-regulation of L-serine hydro-lyase (adding homocysteine; L-cystathionine-forming), down-regulation of beta-thionase activity, down-regulation of cystathionine beta-synthase activity, down-regulation of methylcysteine synthase activity, down-regulation of serine sulfhydrase activity, down-regulation of serine sulfhydrylase activity, downregulation of L-serine hydro-lyase (adding homocysteine), downregulation of L-serine hydro-lyase (adding homocysteine; L-cystathionine-forming), downregulation of beta-thionase activity, downregulation of cystathionine beta-synthase activity, downregulation of methylcysteine synthase activity, downregulation of serine sulfhydrase activity, downregulation of serine sulfhydrylase activity, negative regulation of L-serine hydro-lyase (adding homocysteine), negative regulation of L-serine hydro-lyase (adding homocysteine; L-cystathionine-forming), negative regulation of beta-thionase activity, negative regulation of methylcysteine synthase activity, negative regulation of serine sulfhydrase activity, negative regulation of serine sulfhydrylase activity

Any process that stops, prevents or reduces the frequency, rate or extent of cystathionine beta-synthase activity.