H indicate strain background.
401-499 Plate number is indicated by the other empty well. Beginning with A1, a sequential well has been left empty to indicate the plate number. Identification wells are omitted as they contain no data. Plates numbered in the 70's for any strain have special growth needs and have been grown in YPD with G418 and 50um riboflavin. It is recommended that at least one working copy of the plates be made as soon as possible.