H 1415 (OTTO) L-Histidine monohydrochloride, 99% Cas 5934-29-2 - used in cell culture media formulations used in biomanufacturing. H 1415 (OTTO) L-Histidine monohydrochloride, 99% Cas 5934-29-2 - used to study cultures of the human T-lymphoblastic leukemia cell line MOLT-4 to study modulation