Figure 3.

Northern blot analyses using a synapsin IIIa probe. Human Northern blots (CLONTECH) were hybridized to a probe derived from the 3′ UTR of human synapsin IIIa mRNA. Results using a control actin probe are shown at the bottom of each blot. Molecular sizes are shown in kilobases (kb). Arrowheads point to the 13.0-, 7.9-, 3.5-, and 2.0-kb transcripts. (A) Distribution of synapsin IIIa mRNA in various human tissues. The actin probe recognizes α- and β-actin in heart and skeletal muscle but only β-actin in the other tissues. (B) Distribution of synapsin IIIa mRNA in human brain. The sample designated “whole brain” was derived from a different individual than the other samples on these blots.