Abstract: The present disclosure is directed to selecting order checkout options. In particular, the methods and systems of the present disclosure may, responsive to receiving data describing a potential order for an online shopping concierge platform: generate, based at least in part on the data describing the potential order, a plurality of different and distinct checkout options for the potential order; determine, for each checkout option of the plurality of different and distinct checkout options and based at least in part on one or more machine learning (ML) models, a probability that a customer associated with the potential order will proceed with the potential order if presented with the checkout option; and select a subset of checkout options for presentation to the customer based on their respective determined probabilities that the customer will proceed with the potential order if presented with the subset of checkout options.

Abstract: Provided is a method for purifying total mRNA from total RNA with SLFN13, comprising the following steps of: (1) total RNA extraction; (2) enzyme digestion of tRNA and rRNA in the total RNA by using SLFN13; and (3) after the enzyme digestion is completed, directly heating at 70° C. for 15 min to deactivate the enzyme, to obtain the purified total mRNA.