Subject: Rbfcas-21 and Rbfsls-15 The following information was provided by Annette Parks of Exelixis, Inc. (5/04). Rbfcas-21 is an EMS-induced mutation that makes a truncated protein of 102 aa. Rbfsls-15 is an 11 nucleotide X ray-induced deletion which results in the addition of 14 novel amino acids after amino acid 519 (total protein length of 533 aa).